Question

What is the solution to this system:
4x+9y=28
- 4x-y=-28

Answer 1

x = 7

y = 0

Explanation:

→To solve this, you can use the elimination method. To do this, you must have one set of variables that can cancel each other out. In the problem given, we already have positive 4x and -4x, making them cancel out:

4x + 9y = 28

-4x - y = -28

__________

8y = 0

y = 0

→Plug in 0 for y, into an equation:

-4x - 0 = -28

-4x = -28

x = 7