8.a)2x-5(x+3)+4=6x+24-2(x-1)-18=>
=>2x-5x-15+4=6x+24-2x+2-18=>
=>-3x-11=4x+24-16=>-3x-11=4x-8=>-3x-4x=-8+11=>
=>-7x=3=>-x=3/7=>x=-3/7
b) 1/2•{1/2•[1/2•(1/2x-1(amplificam cu 2)-1]-1}-1=0
1/2•{1/2•[1/2•(x-2/2)-1]-1}-1=0
1/2•[1/2•(x-2/4-1(amplificam cu 4)-1]-1=0
1/2•[1/2•(x-2-4/4)-1]-1=0
1/2•(1/2•x-6/4-1)-1=0
1/2•(x-6/8-1(amplificam cu 8)-1=0
1/2•(x-6-8)-1=0
1/2•(x-14)-1=0
x/28-1(amplificam cu 28)=0
x- 28/28=0
x/28=28/28
x/28=1
x=28
c) 5x-7/2(amplificam cu 3) - 2x+7/3(amplificam cu 2) =3x-14(amplificam cu 6)
3(5x-7) -2(2x+7) =6(3x-14)
15x-21-4x-14=18x-84
11x-35=18x-84
11x-18x=-84+35
-7x=-49
x=7
