Question

Resolva as equações.

a) x/2 =8
b) x/2= -8
c) 3x/4 =9
d) 2x/3 = -10

Answer 1

$a) \frac{x}{2}=8 \\ \\ x=16 \\ \\ b) \frac{x}{2}=-8 \\ \\ x=-16 \\ \\ c) \frac{3x}{4} =9 \\ \\ x= \frac{36}{3}=12 \\ \\ d) \frac{2x}{3}=-10 \\ \\ x= \frac{-30}{2} =-15$

Answer 2

a) x/2 = 8        mmc entre 2 e 1 = 2
x= 16

b) x/2 =-8      mmc entre 2 e 1  = 2

x = - 16

c) 3x/4 = 9      mmc entre 4 e 1 = 4

3x=36
x= 36/3
x= 12

d) 2x/3 = - 10     mmc entre 3 e 1 = 3


2x= -30
x= -30/2
x= - 15