Example

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

Question

$$(20-8)(4-2)/$$

Answer

24

Solution


Simplify  \(20-8\)  to  \(12\).
\[12\times (4-2)/\]
Simplify  \(4-2\)  to  \(2\).
\[12\times 2/\]
Use this rule: \(a \times \frac{b}{c}=\frac{ab}{c}\).
\[12\times 2\]
Simplify.
\[24\]
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