Question

решите уравнение: y+1.5y+(1.5y+6)=78

Answer 1

y+1.5y+(1.5y+6)=78

2.5у+(1.5у+6)=78

2.5у+1.5у+6=78

4у=78-6

4у=72

у=18

Ответ:у=18