Question

Calcule x e y nas igualdades.

Answer 1

a) x-3=4

x=4+3

x=7

9=y^2

y=√9

y=3

b) 3x=x+6

3x-x=6

2x=6

x=6/2

x=3

0=3y-12

0+12=3y

12=3y

y=12/3

y=4