Question

I NEED HELP PLEASE!!!!!!!!!!!!!
Solving system of equations with fractional coefficients

Answer 1

@TheSmartOne

Answer 2

@SamsungFanBoy

Answer 3

what do you need help with? I might be able to give you some tips. :)

Answer 4

Solve the following system of equations
-3/5x+10y=-1/5
1/3x-1/2y=-10

Answer 5

x=
y=
????????????????

Answer 6

@Owl_Eyes03

Answer 7

@geerky42 @gleem @Kainui @sleepyhead314 @confluxepic

Answer 8

@mathmath333

Answer 9

the principle is the same as with integer coefficients.

Let's try elimination

Multiply the whole of the second equation by 20

Post the new equation here

Answer 10

47x+100y=49
31x-19y=-100

Answer 11

?????????????? @MrNood

Answer 12

what is that? it bears no relation to the original question as far as I can see

Multiply the whole of the second equation by 20

Post the new equation here

Answer 13

i dont understand

Answer 14

same as with intergers we need to get the same coefficen in both equations .

In the first you have 10y

So to get 10 y in th second you need ot multiply it by 20

Answer 15

im not understanding how to change them from fractions

Answer 16

do you know the method of elimination to solve systems of equations?

you do not necessarily need to get rid of the fractions - fractions are just numbers

Answer 17

yes, i just need to be explained how to do this with fractions

Answer 18

\[\frac{ -3x }{ 5 } +10y = \frac{ -1 }{ 5 }\]

\[\frac{ x }{ 3} - \frac{ y }{ 2 } = -10\]

is this the correct layout?

Answer 19

no theres 1s where the x and y RE THE X AND Y ARE ON THE RIGHT OF THE FRACTIONS

Answer 20

yes but that is the same : 1x is the same as x

\[\frac{ 1 }{ 3 }x is the same as \frac{ x }{ 3 }\]

OK?

Answer 21

OK

Answer 22

So - to eliminate a variable you need to make it so that the coefficient is th esame in 2 equations.

You have 10 y in the first equation
You have -y/2 in the second.

So - if oyu multiply the whole second equation by 20 you will see that you get -10y in the new equation

So - multiply the second equation by 20 and pot the answer here

Answer 23

60x+40y=-200?

Answer 24

no

20*1/3 x - 20 * 1/2 y = 20 * -10

write that in a simpler form

Answer 25

im not understanding, thats what i got when i multiplied the equation?

Answer 26

6x-10y=-200?

Answer 27

that is a bit better

the first term is not correct - the other 2 are

Answer 28

and how did you know to multiply by 20?

Answer 29

8x-10y=-200?

Answer 30

20 * x/3

same as with integers we need to get the same coefficent in both equations .
In the first you have 10y


So to get 10 y in the second you need to multiply it by 20 (that's how I knew)

Answer 31

ok, was my new equation correct?

Answer 32

no - how do you get 8 (or 6) from 20 * 1x/3?

leave it as a fraction

Answer 33

i dont understand

Answer 34

20/60?

Answer 35

what is 20 * 1/3

leave it as a fraction

Answer 36

20*1=20 and 20*3=60

Answer 37

but if oyu multiply top AND bottom by 20 then oyu have multiplied by 20/20

you only multiply th eTOP

so what is 20 * 1x/3

Answer 38

20

Answer 39

you did it right for 20 * y/2

do the same for 20 *x/3

Answer 40

60

Answer 41

\[20 \times \frac{ x }{ 3 }\]

Answer 42

1/60?

Answer 43

it's 20x/3

so your new equations are
-3/5x+10y=-1/5
-20x/3 -10y = -200

SO you can see that if you add them together you will eliminate y

add them togheter and post eh result here

Answer 44

i dont know how to do it with fractions, thats why i wanna make the fractions whole numbers

Answer 45

OK

try this

Multiply the first equation by 5

multiply the second equation by 6

If you can do that then I will help

Post BOTH new equations here

Answer 46

i do not know how to do anything with fractions. how do i make them whole numbers?

Answer 47

you make them whoe by doing what I said above

Multiply the first equation by 5

multiply the second equation by 6

Answer 48

i dont know how.

Answer 49

Then I'm afraid you cannot answer this questin.

Maybe you should go back to your text book and revise fractions and come back to this..sometimes there are certain prerequisites to have before you can progress on to a different topic

Answer 50

i dont have a text book. its an online class, thats why im having such a hard time

Answer 51

BUt oyu need some other skills before you can answer this.

You cannot expect to answer a question on fractions if you cannot multiply a fraction by 5

Answer 52

do i multiply the top of the fraction as well

Answer 53

You ONLY multiply the top.

But the fact that you have ot ask this implies that oyu don't have the background skills to do THIS question.

You should return to your calss on fractions and multiplying them and simplifiying them until you can do that , THEN come back to this

Answer 54

ok thanks for your help