Question

Sole the system of equation by elimination
2x + 2y = 4
x - 2y = 11

Answer 1

{2x+2y=4

{x-2y=11 (+)

2x+x+2y-2y=4+11

3x=15 /:3

x=5

2x+2y=4

2*5+2y=4

10+2y=4 /-10

2y=-6 /:2

y=-3

Solution: (5; -3)