Example

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

Question

$$10-12+20-23+10+3-1$$

Answer

7

Solution


Simplify  \(10-12\)  to  \(-2\).
\[-2+20-23+10+3-1\]
Simplify  \(-2+20\)  to  \(18\).
\[18-23+10+3-1\]
Simplify  \(18-23\)  to  \(-5\).
\[-5+10+3-1\]
Simplify  \(-5+10\)  to  \(5\).
\[5+3-1\]
Simplify  \(5+3\)  to  \(8\).
\[8-1\]
Simplify.
\[7\]
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