Question

Resolva as equações:e) 2(x-1)=7+x f) 2(x-1)-2(x-2)=-(x-3) g) 3-(2x-1)=3(-2x-1)​

Answer 1

e) 2(x-1)=7+x

2x-2=7+x

2x-x=7+2

x=9

f) 2(x-1)-2(x-2)=-(x-3)

2x-2-2x+4=-x+3

2x-2x+x=3+2-4

x=1

g) 3-(2x-1)=3(-2x-1)

3-2x+1=-6x-3

-2x+6x=-3-1-3

4x=-7

x=-7/4