Question

0.2(5y-2)=0.3(2y-1)-0.9

Answer 1

0.2(5y-2)=0.3(2y-1)-0.9
y-0.4 = 0.6y-0.3-0.9 
y-0.4=0.6y-0.12
y-0.6y= -0.12 + 0.4
0.4y = -0.8
y = -0.8/0.4
y = -2
Ответ:у = -2 

Answer 2

спасибо))