Question

Resolva as seguintes equações:
a) | x - 2 | = 4
b) | x + 2 | = 3
c) | 2 - x / 4| = x - 1
d) | 4 - 3x | = 3 x - 4

Answer 1

a)x-2=4
x=4+2
x=6
b)x+2=3
x=3-2
x=1
c)2-x/4=x-1
m.m.c=4
4(2-x)=4(x-1)
6-4x=4x-4
6+4=4x+4x
10=8x
x=10/8=
x= $\frac{5}{4}$