a. 4-3(x-1)=6×+1 b.1-{2x-3(5+4x)}=156

a.) 4-3(x-1)=6×+1
4-3x-1 =6x+1
3-3x =6x+1
-3x-6x= 1-3
-9x=-2
x= 2/9

b.) 1-{2x-3(5+4x)}=156
1- (2x - 15 -12x) =156
-2x+15+12x= 156-1
10x +15=155
10x= 155-15
10x= 140
x=140:10
x= 14

A. 4 - 3(x-1) = 6x + 1
= 4 - 3x + 3 = 6x + 1
= -3x - 6x = 1 - 4 - 3
= -9x = -6
= x = 2/3

B. 1 - [2x - 3 (5 + 4x )} = 156
= 1 - [ 2x - 15 - 12x] = 156
= 1 - 2x + 15 + 12 x = 156
= -2x + 12x = 156 - 1 - 15
= 10x = 140
= x = 140 / 10 = 14