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rezolvati ecuatiile: 4•(4x-15)+3=7

Răspuns :

4*(4x-15)+3=7|-3
4*(4x-15)=4|:4
4x-15=1|+15
4x=16|:4
x=4
16x -60 +3 =7
16x= 7 + 60 - 3
16x= 64
x= 64/16 = 4