Solve for s
s=7
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4s-7=3\times 7
Multiply both sides by 7.
4s-7=21
Multiply 3 and 7 to get 21.
4s=21+7
Add 7 to both sides.
4s=28
Add 21 and 7 to get 28.
s=\frac{28}{4}
Divide both sides by 4.
s=7
Divide 28 by 4 to get 7.
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