Example

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

Question

$$754+ \left(15- \right) _{ 2 } +65(7-2)- 42 _{ 2 }$$

Answer

$$1094-_2-42_2$$

Solution


Simplify  \(7-2\)  to  \(5\).
\[754+15-_2+65\times 5-42_2\]
Simplify  \(65\times 5\)  to  \(325\).
\[754+15-_2+325-42_2\]
Simplify  \(754+15\)  to  \(769\).
\[769-_2+325-42_2\]
Simplify  \(769-_2\)  to  \(769-_2\).
\[1094-_2-42_2\]
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