Example

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

Question

$$C=(55+25)-(2 \times 30)$$

Answer

C=20

Solution


Remove parentheses.
\[C=55+25-2\times 30\]
Simplify  \(2\times 30\)  to  \(60\).
\[C=55+25-60\]
Simplify  \(55+25\)  to  \(80\).
\[C=80-60\]
Simplify  \(80-60\)  to  \(20\).
\[C=20\]
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