Write the algebraic expression 'Three times $a$ is subtracted from seven times $b$ and the difference is divided by $2$ '.

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Solution

According to the question:
Three times $a$ is subtracted from seven times $b$ , i.e, $(7 b - 3 a)$
This difference above is divided by $2$ , i.e, $(7 b - 3 a) / 2$
Thus, the algebraic expression is $(7 b - 3 a) / 2$ .

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