4,7y-(2,5y+12,4)=1,9

Question

4,7y-(2,5y+12,4)=1,9

Answer 1

4,7y-(2,5y+12,4)=1,9,

4,7y-2,5y-12,4=1,9,
2,2y=1,9+12,4,
y=14,3/2,2,

у=6,5

Answer 2

4.7y-2.5y-12.4=1.9

2.2y=14.3

y=6.5

ответ :6,5