Question

a)2 ori {3 ori [4 ori (5x+1)-3]-2}=2
c) 575-7 ori [1024-5 ori (4x-12):4]:12=1
e) 12(x-11)=7(X-6)

Answer 1

a)2×{3× [4× (5x+1)-3]-2}=2
{3× [4× (5x+1)-3]-2}=2÷2
3× [4× (5x+1)-3]-2=1
3× [4× (5x+1)-3]=1+2
3× [4× (5x+1)-3]=3
4× (5x+1)-3=3÷3
4× (5x+1)-3=1
4× (5x+1)=1+3
5x+1=4÷4
5x+1=1
5x=1-0
5x=0
x=0

c) 575-7 × [1024-5 × (4x-12)÷4]÷12=1
7 × [1024-5 × (4x-12)÷4]÷12=575-1
[1024-5 × (4x-12)÷4]÷12=574÷7
[1024-5 × (4x-12)÷4]÷12=82
1024-5 × (4x-12)÷4=82×12
1024-5 × (4x-12)÷4=984
5 × (4x-12)÷4=1024-984
5 × (4x-12)÷4=40
(4x-12)÷4=40÷5
4x-12=8×4
4x-12=32
4x=32+12
4x=44
x=11

e) 12(x-11)=7(X-6)
12x-132=7x-42
12x-7x=132-42
5x=90
x=90÷5
x=18