Example

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

Question

$$.(-7)3(+2)1$$

Answer

.-7*3*2*1

Solution


Simplify  \(+2\)  to  \(2\).
\[.-7\times 3\times 2\times 1\]
Simplify  \(7\times 3\)  to  \(21\).
\[.-7\times 3\times 2\times 1\]
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