Example

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

Question

$$-9+4-5-(6+5-9+15)$$

Answer

-27

Solution


Simplify  \(6+5\)  to  \(11\).
\[-9+4-5-(11-9+15)\]
Simplify  \(11-9\)  to  \(2\).
\[-9+4-5-(2+15)\]
Simplify  \(2+15\)  to  \(17\).
\[-9+4-5-17\]
Simplify  \(-9+4\)  to  \(-5\).
\[-5-5-17\]
Simplify  \(-5-5\)  to  \(-10\).
\[-10-17\]
Simplify.
\[-27\]
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