Question

resolva o sistema linear :
2y-3x=0
-y+6x=45

Answer 1

2y-3x=0
-y+6x=45
-y=45-6x(x-1)
y=-45+6x
2(-45+6x)-3x=0
-90 + 12x-3x=0
9x=90
x=90/9
x=10


2y - 3(10)=0
2y-30=0
2y=30
y=30/2
y=15