Question

Seja a função linear y = -2 x - 5 determine o valor de x quando y =-3-3x


-2


3


2⁄5


-3


2

Answer 1

y+2x=-5  .(-1)
y+3x=-3

-y-2x=5(cancela o y)
y+3x=-3

x=2


y+3x=-3
y+3.2=-3
y+6=-3
y=-3-6
y=-9