Răspuns:
3a+75=30
3a=30-75
a=-45:3
a=-15
_______
2a-(-24)=-30
2a+24=-30
2a=-30-24
a=-54:2
a=-27
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Răspuns:
3a+75=30
3a=30-75
a=-45:3
a=-15
_______
2a-(-24)=-30
2a+24=-30
2a=-30-24
a=-54:2
a=-27