Question

Solve each equation x+2y=1 and -x+y=2

Answer 1

x = -1, y = 1

Explanation:

x + 2y = 1

Subtract 2y from both sides

x + 2y - 2y = 1 - 2y (simplify) -> x= 1 - 2y

----

-x + y = 2

Subtract y from both sides

-x + y - y + 2 - y (simplify) -> -x = 2 - y

Divide both sides by -1

`(-x)/(-1)` =
`(2)/(-1)` -
`(y)/(-1)` (simplify) -> x = -2 + y