# arithmetic

Steve's mom's age is 7 years less than 3 times Steve's age. The sum of their ages is 65 years. Find their ages.

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3. 👁 65
1. Let s = Steve's age.

s + (3s - 7) = 65
4s - 7 = 65
4s = 72
s = 18

Check:

Steve is 18
His mom is (3 * 18) - 7 = 54 - 7 = 47

14 + 47 = 65

Yep.

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posted by Ms. Sue
2. 18 + 47 = 65

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posted by Ms. Sue
3. Let M = mom's age
let S = steve's age.

M+S = 65
3S = M+7
solve for M and S.
Check my thinking.

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4. Steves mom is 47 and Steve is 18

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posted by Rachael

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