Question

решите уравнение:
б) 4.7у-(2.5у+12.4)=1.9

Answer 1

4.7y-2.5y-12.4=1.9
2.2y=1.9+12.4
2.2y=14.3
y=14.3/2.2
y=143/22=13/2=6.5