Question

1) Resolva as seguintes equações do primeiro grau
A) 4x-1=3(x-1)
B) 3(x-2)=2x-4
C) 2(x-1)=3x+4
D) 7(x-4)=2x=3

Answer 1

a) 4x-1=3(x-1)
4x-1=3x-3
4x-3x=-3+1
x=-2

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

c) 2(x-1)=3x+4
2x-2=3x+4
2x-3x=4+2
-x=6
x=-6

d) 7(x-4)=2x-3
7x-28=2x-3
7x-2x=-3+28
5x=25
x=25/5
x=5