Question

Plz help ! Solve by adding or subtracting.

Answer 1

Firstly, add x+y=-10 and 2x-y=-8 to get $3x=-18$ . From here you can solve for x.

For this, all you need to do is divide 3 on each side, and your answer will be $x=-6$

To solve for y, just replace x for -6 in either equation and solve.

$-6+y=-10\\ y=-4$

In short, x = -6 and y = -4.

Answer 2

x + y = -10

2x - y = -8

-----------------Add

3x = -18

x = -6

Substitute x = -6 into x + y = -10

x + y = -10

-6 + y = -10

y = -4

Answer

x = - 6 and y = - 4