Example

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

Question

$$-80+(76)$$

Answer

-4

Solution


Reorder the terms.
\[76-80\]
Use this rule: \(a-b=-(b-a)\).
\[-(80-76)\]
Use the algorithm method.
710
80
-76
4
After simplification, we have:
\[-(80-76)=-4\]
Therefore, \(-80+76=-4\).
\[-4\]
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