Example

3(r+2s)=2t-4
a⋅(b-2)=3b
3(r+2s)=2t-4
a⋅(b-2)=3b

Question

$$(20- \frac{ 1 }{ 2 } ) \times 10$$

Answer

195

Solution


Simplify  \(20-\frac{1}{2}\)  to  \(\frac{39}{2}\).
\[\frac{39}{2}\times 10\]
Use this rule: \(\frac{a}{b} \times c=\frac{ac}{b}\).
\[\frac{39\times 10}{2}\]
Simplify  \(39\times 10\)  to  \(390\).
\[\frac{390}{2}\]
Simplify.
\[195\]
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