1)
y-5=3y-25
-5+25=3y-y
20=2y
y=10
2)
5x+6=10x+5
6-5=10x-5x
1=5x
1/5=x
3)
9y-11=-10+12y
-11+10=12y-9y
-1=3y
-1/3=y
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Verified answer
1)
y-5=3y-25
-5+25=3y-y
20=2y
y=10
2)
5x+6=10x+5
6-5=10x-5x
1=5x
1/5=x
3)
9y-11=-10+12y
-11+10=12y-9y
-1=3y
-1/3=y