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cum se rezolva [291-(338:x-289:x 124)*2]*4+4=120

Răspuns :

[291-(338:x-289:x + 124)*2]*4+4=120
[291-(49:x + 124)*2]*4=120-4
[291-(49:x + 124)*2]*4=116
291-(49:x + 124)*2=29
-(49:x +124)*2=29-291
-(49:x + 124)*2=-262
49:x + 124=262:2
49:x =131-124
49:x=7
x=7