Example

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

Question

$$21c(m-4)-7c=$$

Answer

21*c*m-91*c

Solution


Expand by distributing terms.
\[21cm-84c-7c\]
Collect like terms.
\[21cm+(-84c-7c)\]
Simplify.
\[21cm-91c\]
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