Example

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

Question

$$2-1-2 \times 3-2-3$$

Answer

-10

Solution


Simplify  \(2\times 3\)  to  \(6\).
\[2-1-6-2-3\]
Simplify  \(2-1\)  to  \(1\).
\[1-6-2-3\]
Simplify  \(1-6\)  to  \(-5\).
\[-5-2-3\]
Simplify  \(-5-2\)  to  \(-7\).
\[-7-3\]
Simplify.
\[-10\]
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