Question

f) 7(x-1)-(x-4)=8
g) 3(2x-1)+2(2+3x)=3

Answer 1

9(x+1)-28=7(x-3)
9x+9-28=7x-21
9x-7x=-21-9+28
2x=-2
x=-2/2

7(x-1)-(x-4)=8
7x-7-x-4=8
6x=8+4+7
6x=19
x=19/6
x=3.16

3(2x-1)+2(2+3x)=3
6x-3+4+6x=3
12x=3+3-4
12x=2
x=2/12
x=0.16    Ainda acho que está faltando algo nessas contas. 

Answer 2

$f) 7 ( x - 1 ) - ( x - 4 ) = 8 \\ 7x - 7 - x + 4 = 8 \\ 7x - x = 8 + 7 - 4 \\ 6x = 11 \\ x = \frac{11}{6} \\ x = 1,833 \\ \\ g ) 3 ( 2x - 1 ) + 2 ( 2 + 3x ) = 3 \\ 6x - 3 + 4 + 6x = 3 \\ 12x = 2 \\ x = \frac{2}{12} \\ x = \frac{1}{6}$