Răspuns:
5x+11=66
5x=66-11
5x=55
x=55÷5
x=11
x×(-7)=14
x=14÷(-7)
x=-2
5x=-30
x=-30÷5
x=-6
12x=-8+4x
12x-4x=-8
8x=-8
x=-8÷8
x=-1
x÷(-3)=-12
x=-12÷(-3)
x=4
35-x=23
-x=23-35
-x=-12
14+2x=-26
2x=-26-14
2x=-40
x=-40÷2
x=-20
7x-6=x
7x-x=-6
6x=-6
x=-1
120÷x=-30
x=-30-120
x=-150
4-3x=-35
-3x=-35-4
-3x=-39
x=-39÷(-3)
x=13
25+5x=0
5x=25
x=25÷5
x=5
-6+x=-x
x+x=-6
2x=-6
x=-6÷2
x=-3
5x-3=3x+11
5x-3x=11+3
2x=14
x=14÷2
x=7
4x+13=3x+15
4x-3x=15-13
x=12
-2x+15=-3x+9
-2x+3x=9-15
x=-6
-47-17x=-9-16x
-17x+16x=-9+47
-x=38
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