3y+4y
7y
3+y=7
y=4
c-8=4
c=12
2a+8a
10a
10+a=15
a=5
t-10=5
t=15
3/4x+1/4x
x
b+6=18
b=12
x-45=5
x=50
1/6y+2/3y
5/6y
v+12=24
v=12
y-9=3
y=12
2/5a+3/6a
27/30a
30+b=51
b=21
w-50=10
w=60
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