You can put this solution on YOUR website! First things first, distribute the 5.
5(y - 2) - 10 = 55
5y - 10 - 10 = 55
5y - 20 = 55
Next, add to both sides.
5y - 20 + 20 = 55 + 20
5y = 75
Now divide both sides by 5 (or multiply by 1/5 (reciprocal) to get y)
y = 15
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