Example

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

Question

$$*\frac{2}{3}+\frac{-4}{5}+\frac{7}{15}+\frac{-11}{20}$$

Answer

-427

Solution


Simplify.
\[\times 23-45+715-1120\]
Simplify  \(\times 23-45\)  to  \(\times 23-45\).
\[23-450\]
Simplify.
\[-427\]
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