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KameliaSerban
a fost răspuns

1+{2•[3+(x-4)•5]:6}•7=8

Răspuns :

Alecs144
1+{2•[3+(x-4)•5]:6}•7=8
1+[2•(3+5x-20):6]•7=8
1+(6+10x-40:6)•7=8
(6+10x-40:6•7)=8-1
(6+10x-40:6)•7=7
6+10x-40:6=7:7
6+10x-40:6=1
6+10x-40=6•1
6+10x=6+40
6+10x=46
10x=46-6
x=40:10
x=4