Solve for S
S=70
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S≔70
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S=20+\frac{1}{2}\times 100
Multiply 10 and 2 to get 20.
S=20+\frac{100}{2}
Multiply \frac{1}{2} and 100 to get \frac{100}{2}.
S=20+50
Divide 100 by 2 to get 50.
S=70
Add 20 and 50 to get 70.
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