Question

ver resposta conta e soluçao de 3x+y=12 x-5y=16

Answer 1

3x+y = 12
y = 12-3x

x - 5y = 16
x - 5.(12-3x) = 16
x - 60 + 15x = 16
16x = 16 + 60
x = 76/16 = 4,75

y = 12 - 3.x
Y = 12 - 3.4,75
y = -2,25