Question

1-Resolva os Sistemas

a){x-2y=3
{3x-6y=9

b)[x-7y-11z=6
[x+2y-4z=1
{x+3y-3z=4

Answer 1

a)x-2y=3 (-15)
3x-6y=9 (5)

-15x+20y = -45
15x-30y = 45
__________
-10y=0
y=0/10
y=0

x-2y=3
x-2(0)=3
x-0=3
x=3+0
x=3