Question

Resolva as equações abaixo :

A) 3 + 7 x = - 39


B) 5 x - 3 = 9 - x


C) 4 ( x - 3 ) = x - 8



D) x / 8 x 2 = 3



E) 5 x / 2 + 3 = 3 x / 2 x 5


F) 4 x - 35 = x / 2 + 5

​

Answer 1

A)7x=-39-3
7x=-42
X=-42/7
X=-6

B)5x+x=9+3
6x=12
X=12/6
X=2

C)4x-12=x-8
4x-x=-8+12
3x=4
X=3/4 ou 0,7

D)x/8x=3-2
X/8x=1
X/8x

E)5x/2-3x/2x=5-3
2x/x=2
2x=2
X=2/2
X=1

F)4x-x/2=5-35
-3x=-30
X=-30/-3
X=10