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a fost răspuns

rezolvati ecuatiile q + a) 7/5x=3 4/15 b) 5x/18-1 2/3=7/12

Răspuns :

a) 7/5x=3 4/15 
7/5x=49/15
x=7/3

b) 5x/18-1 2/3=7/12
5x/18-5/3=7/12
10x-60=21
10x=21+60
10x=81
x=81/10

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