SOLUTION: -6y+15=3(y-1)

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-6y+15=3(y-1)
First distribute the 3; -6y+15=3y-3
Now subtract 3y from both sides; -6y+15-3y=3y-3-3y
-9y+15=-3
Now subtract 15 from both sides; -9y+15-15=-3-15
-9y=-18
Now divide both sides by -9;

y=2
Hope you get it
=)