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Bring all the unknown values to one side and the known values to the other

7s - 12 = 3s - 4

Subtract 3s from both sides

7s - 3s - 12 = 4

4s - 12 = 4

Add 12 to both sides

4s = 4 + 12

4s = 16

Divide both sides by 4

s = 4

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Q: How do you solve 7s-12 equals 3s-4?
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