Question

Resolva as equações:

A) 3(x-2)=2x-4
B)2(x-1)=3x+4
C)3(x-1)-7=15
D)7(x-4)=2x-3
E)3(x-2)=4(3-x)
F)3(3x-1)=2(3x+2)
G)7(x-2)=5(x+3)
H)3(2x-1)=-2(x+3)

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Answer 1

a) 3x-6=2x-4
3x-2x=-4+6
x=2

b) 2x-2=3x+4
2x-3x=4+2
-x=6 .(-1)
x=-6

c) 3x-3-7=15
3x=15+3+7
3x=25
x=25/3

d)7x-28=2x-3
7x-2x=-3+28
5x=25
x=25/5
x=5

e)3x-6=12-4x
3x+4x=12+6
7x=18
x=18/7

f) 9x-3=6x+4
9x-6x=4+3
3x=7
x=7/3

g) 7x-14=x+15
7x-x=15+14
8x=29
x=29/8

h) 6x-3=-2x-6
6x+2x=-6+3
8x=3
x=3/8