Question

Решите уравнения:5(Х)+3=7 :2) 1,7(Х)=4,9=10 3) 2,5(3У)=15

Answer 1

5х+3=7 3)2.5(3у)=15
5х=7-3 7.5у=15
5х=4 у=15/7.5
Х=4÷5 у=2
Х=0.8