Example

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

Question

$$12 \times 1-2 \times (-1)$$

Answer

14

Solution


Simplify  \(12\times 1\)  to  \(12\).
\[12-2\times -1\]
Simplify  \(2\times -1\)  to  \(-2\).
\[12-(-2)\]
Remove parentheses.
\[12+2\]
Simplify.
\[14\]
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