Question

me ajudem pelo amor de deus

Answer 1

x/2+y/3=5
9x-42=2y


x/2+y/3=5
x/2=5-y/3
x=2(5-y/3)
x=10-2y/3

9x-42=2y
9x=2y+42
9x-2y=42
9(10-2y/3)-2y=42
90-18y/3-2y=42
90-6y-2y=42
90-8y=42
-8y=42-90
-8y=-48 *(-1)
8y=48
y=48/8
y=6

x=10-2y/3
x=10-2(6/3)
x=10-12/3
x=10-4
x=6


6/2+6/3=5
3+2=5
5=5

9(6)-42=2(6)
54-42=12
12=12