Question

Solve the following system of equations.
4x+5y = 5
8x+5y = 25

i need to find what x and y equals

Answer 1

You need to find a common factor first
4x+5y = 5
8x+5y = 25

In this case it is -2 :)
Bascially ask yourself which number will i need to multiply to get opposite x values that will cancel out
\(\huge\rm\color{red}{-2(4x+5y = 5)}\)
Tell me the equation you get once you distribute

Answer 2

-8x-10y=-10
not sure if this is right I'm kinda bad at math @pooja195

Answer 3

Thats correct good! :D
\[\huge~\rm-8x-10y=-10\]
\[\huge~\rm~~~~~8x+5y = 25 \]
Now just do simple math whats
\(\huge\rm\color{red}{-8+8=?}\)

Answer 4

-8 +8 is 0 lol

Answer 5

Good so that cancels out :)
-10+5= ?

Answer 6

Need help?

Answer 7

-10+5 = -5???

Answer 8

good so we have -5y=15
i added the -10+25
ok now that we have that
-5y=15
we divde both sides by -5
-5 div -5=1 therefore x is alone now :P
whats 15/-5 ?

Answer 9

15/-5 = -3?

Answer 10

@pooja195

Answer 11

Yes thereofore our y value is -3
now we use substituion to figure out our x value
\[\huge~\rm −8x−10(-3)=−10\]
solve for x

Answer 12

im kinda stuck to be honest -.- I'm so bad at math

Answer 13

\[\huge~\rm~−8x−(10)(−3)=−10\] Simplify both sides of the equation.
\[\huge~\rm~−8x+30=−10\] Subtract 30 from both sides.
\[\huge~\rm~−8x+30−30=−10−30\]\[\huge~\rm~−8x=−40\]
Divide both sides by -8
Take it from here :)

Answer 14

so x would be 5 right ?

Answer 15

yes! :D good job :)
(5,-3)

Answer 16

thank you so much

Answer 17

No problem :D