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6x-4+13=2x+2•5+3 va rog repede

Răspuns :

6x-4+13=2x+10+3
6x-2x=13-9
4x=4
x=1
6x-4+13=2x+2×5+3
6x+9=2x+10+3
6x+9=2x+13
6x-2x=13-9
4x=4=>x=4:4=>x=1