Example

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

Question

$$(5)[\frac{2}{5}\times(\frac{-3}{12})]+[\frac{2}{5}\times\frac{5}{12}]$$

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