Question

metodo de igualación
2x+y=9
x-2y=-8

Answer 1

2x + y = 9
y = 9 - 2x
y = 9 - 2(2)
y = 9 - 4
y = 5

x - 2y = -8
x - 2(9- 2x) = -8
x - 18 - 4x = -85x = 10
x = 2