Question

6.5X+1.4y=59
What is the value of x when y=5?
i dont know how to do this, help??

Answer 1

you can look at this equation like this, 1.4 is being multiplied to the y right?

Answer 2

you can see that?

Answer 3

Yess

Answer 4

so that y in that equation is just a place holder. you can plug in any number into that y and see what x is

Answer 5

So would you multiply the x to 5?

Answer 6

for example x + y = 3 what is x when y = 2

you would replace 2 for y ===> x + 2 = 3

now you can solve for x

Answer 7

I'm so confused, I'm sorry, I'm not good in math lol. you're gonna have to break it down more, if possible.

Answer 8

for this one you have 6.5x + 1.4y = 59

what is x when y = 5

so replace y with 5

6.5x + 1.4 * 5 = 59

Answer 9

now you can solve for x

Answer 10

okay

Answer 11

okay, haha

Answer 12

let me know what is confusing to you. cause the equation can look confusing because of the decimals.

Answer 13

Like, I understand how to replace it now, but what am I supposed to do??

Answer 14

okay great

Answer 15

so can i ask you to show me what you get

Answer 16

huh?

Answer 17

like what does it look like when you replace that 5 with that y. the y should be gone and the 5 should be in its place.

Answer 18

yes got that part

Answer 19

can you show me how it looks by typing it in

Answer 20

your going to be a champion at this after no worries. because these problems are the same everytime

Answer 21

6.5x+5=59

And thanks :)

Answer 22

yeah that looks good. but remember you are multiplying by that 1.4

Answer 23

because the y was multiplied by the 1.4

the 5 should also be multiplied by 1.4

Answer 24

so, 6.5x+7=59 ?

Answer 25

and then do you subract the 7 from both sides, and divide by 6.5?

Answer 26

yeah thats perfect. you seem to be good at solving for x. because waht you just said is exactly how you "SOLVE FOR X" is what its called lol

just take a step back and look at what you did.

you plugged 5 into y so it went from

6.5x + 1.4y = 59 to

6.5x + 1.4(5) = 59

and yeah the 1.4(5) = 7 so its exactly what you got

6.5x + 7 = 59

Answer 27

YAYYY thank you! Um, could you also help me with something else?

Answer 28

what you did is called "plugging in" you stuck the 5 into the y.

and that means when y =5 x = when you solve for x like you said

Answer 29

yess

Answer 30

but i need help with another problem

Answer 31

yeah def

Answer 32

okay, so i have -7(x-2)+5(-3x)-4x
I know how to multiply them while in the parenthesis, but how do i solve for like terms?

Answer 33

like i said these problems are the same everytime you plug in a number into x OR y what ever they ask. and then you can find out what the other one is

Answer 34

okay yeah multiply them out and type what you get

Answer 35

i screwed it up

Answer 36

it was +5(3-X)

Answer 37

i got -7x-14+15-5x-4x

Answer 38

nice

Answer 39

now what do i do?

Answer 40

okay you can think of the x's as money.

Answer 41

yes

Answer 42

when its negative you owe a friend some money you borrowed and when its positive you owed money

Answer 43

looks like you may be broke lol just because of the equation. so what you do is you all the like terms

Answer 44

so you can subtract -7-5-4

Answer 45

alright..

Answer 46

it is -16. also bring the other ones together you have -14+15 = 1

Answer 47

right?

Answer 48

so the final result is -16x + 1

Answer 49

yes

Answer 50

OHH got it (:

Answer 51

it looks nice like this 1 - 16x

Answer 52

right? lol

Answer 53

but either way is correct

Answer 54

thank you so so so muchh(:

Answer 55

yeah i think you learned a lot

Answer 56

you learned to plug in

Answer 57

the second thing is called "accumulating terms"

a term is something in an equation that is being added or subtracted

Answer 58

so in your equation its 5 terms

Answer 59

like 2x + 3
has 2

Answer 60

also this is a term 2(x-4)

Answer 61

so it could be 2(x-4) + 4(x-5)
^ ^
those are both terms so theres two

Answer 62

okay i gtg peace

Answer 63

can you give me a medal lol

Answer 64

lol how

Answer 65

next to my name on the right it says give medal

Answer 66

i gave you one

Answer 67

next to my name on the right it says give medal

Answer 68

thanks(: okay

Answer 69

you didnt give me on! lol no biggy. are you in highschool?

Answer 70

one*