Example

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

Question

$$-10-10-12-2+4+7+5+3+20-12$$

Answer

-7

Solution


Simplify  \(-10-10\)  to  \(-20\).
\[-20-12-2+4+7+5+3+20-12\]
Simplify  \(-20-12\)  to  \(-32\).
\[-32-2+4+7+5+3+20-12\]
Simplify  \(-32-2\)  to  \(-34\).
\[-34+4+7+5+3+20-12\]
Simplify  \(-34+4\)  to  \(-30\).
\[-30+7+5+3+20-12\]
Simplify  \(-30+7\)  to  \(-23\).
\[-23+5+3+20-12\]
Simplify  \(-23+5\)  to  \(-18\).
\[-18+3+20-12\]
Simplify  \(-18+3\)  to  \(-15\).
\[-15+20-12\]
Simplify  \(-15+20\)  to  \(5\).
\[5-12\]
Simplify.
\[-7\]
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