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calculati: 1)2x+3=11 2)5x-2=-27 3)3X+2=23 4) -10X-9=-79 ??? va roggg

Răspuns :

2x+3=11 2x=11-3 2x=8 x=4
5x-2=-27 5x=-27+2 5x=29 x=29/5
3x+2=23 3x=23-2 3x=20 x=20/3
-10x=-9=-79 -10x=-79+9  -10x=-70 x=-70/10 x=-7