1) x=-2 2/5+6 1/4
x=-2 8/20+6 5/20
x=5 25/20-2 8/20
x=3 17/20
2) A=-2 2/5+6 1/4
A=3 17/20
3) 6 1/4-y=2 2/5
y=6 1/4-2 2/5
y= 6 5/20 -2 8/20
y = 5 25/20- 2 8/20
y=3 17/20
-(6 1/4-y) =2 2/5
y= 2 2/5 +6 1/4
y= 2 8/20 +6 5/20
y=8 13/20
4) -15-x-28+15=-305
-x=-277
x=277