To solve problems in algebra, all we need to do is get all the numbers on one side of the equals sign. Let's try: y + 5 = 12 We can add or subtract numbers from either side of the equation as long as we make sure we do the same to each side. Let's subtract 5: y + 5 - 5 = 12 - 5 Taking 5 off both sides simplifies things on the left of the equals sign (since + 5 - 5 means no change!): y = 12 - 5 So the answer is y = 7
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