2/5+3/3-у=10/15 помогите

Question

2/5+3/3-у=10/15 помогите

Answer 1

2/5+3/3-y=10/15
6/15+1-10/15=y
y=1-4/15
y=11/15
Ответ: 11/15

Answer 2

2/5 + 3/3-у = 10/15
3/3-у = 4/15
3-у= 4/15 * 3
3 - у = 0.8
-у = -2.2
у = 2.2