Question

How do I do
y=7x-5
2x+y=13

Answer 1

x = 2, y = 9

Explanation:

y = 7x - 5

2x + y = 13

These equations can both be set to equal y.

y = 7x - 5

y = -2x + 13

Now that they both equal y, you can set them equal to each other.

7x - 5 = -2x + 13

add 2x to both sides

9x - 5 = 13

add 5 to both sides

9x = 18

divide by 9

x = 2

plug x into either equation

y = 7(2) - 5

y = 14 - 5

y = 9

2(2) + y = 13

4 + y = 13

y = 9