Example

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

Question

$$4-43$$

Answer

-39

Solution


Use this rule: \(a-b=-(b-a)\).
\[-(43-4)\]
Use the algorithm method.
313
43
-4
39
After simplification, we have:
\[-(43-4)=-39\]
Therefore, \(4-43=-39\).
\[-39\]
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