Question

Os pares ordenados (2x, y) e (3y - 9, 8 - x) são iguais. Determine x e y

Answer 1

2x = 3y-9
y = 8-x

2x = 3(8-x)-9
2x = 24 - 3x - 9
5x = 24 - 9
x = 15/5
x = 3

y = 8-x
y = 8-3
y = 5