Question

Resolva as seguintes equações:
A) 3x + 9= x-3
B) 2(x+3)= 7
C) -4x = -32
D) x+x = 42

Answer 1

A) 3x-x=-3-9
2x=-12
x=-6

B) 2x+6=7
2x=7-6
x=1/2

C)-4x=-32 (-1)
4x=32
x=8
D) 2x=42
x=21