Question

Find the solution to the equation.

2x - y = -3
x + y = 0

(0, 0)

(-1, 1) correct?

(1, -1)

Answer 1

(-1, 1)

Answer 2

2x - y = -3
-y = -2x - 3
y = 2x + 3
now sub 2x + 3 in for y in the other equation
x + y = 0
x + 2x + 3 = 0
3x + 3 = 0
3x = -3
x = -1
now sub -1 in for x in either equation to find y
2x - y = -3
2(-1) - y = -3
-2 - y = -3
-y = -3 + 2
-y = -1
y = 1
check...
x + y = 0
-1 + 1 = 0
0 = 0 (correct)

solution is (-1,1)

Answer 3

yes, thanks

Answer 4

way to go...you got the correct answer :)