Example

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

Question

$$-7-2+8+4$$

Answer

3

Solution


Simplify  \(-7-2\)  to  \(-9\).
\[-9+8+4\]
Simplify  \(-9+8\)  to  \(-1\).
\[-1+4\]
Simplify.
\[3\]
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