Question

Guys i have another one cx
Solve the equation
x-2y= -9
2x+7y=4

Answer 1

Hint:

x = 2y - 9

Use substitution

Answer 2

@Hero
here's what i have so far
2x-4y=-18
2x+7y=4
3y=-14
y=-4.6
but im not sure thats right .-.

Answer 3

How did you get 3y = -14?

Answer 4

-4+7 = 3
-18+4= -14

Answer 5

@Hero

Answer 6

Well, but you have to perform the same operation for each term

You subtracted 2x - 2x to get zero
You have to also subtract
7y - (-4y)
4 - (-18)

Answer 7

If you did that you would have

11y = 22

Answer 8

so it'd be y= -4.6 and x=2
@Hero
right???

Answer 9

I get y = 2

Answer 10

y = 22/11 = 2

Answer 11

oh i see.. thank you!

Answer 12

Sorry y = 2 so

2x+7y=4
2x + 7(2) = 4
2x + 14 = 4
2x = 4 - 14
2x = -10
x = -10/2
x = -5