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Multiply both sides of an equation by an expression?

Posted 6 months ago
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For example, a ==b ---> a * c == b * c. Thanks.

3 Replies

In version 11.3 we have MultiplySides:

MultiplySides[x/3 == 7, 3]

In earlier version you can Map the multiplication:

Map[3 # &, x/3 == 7]
Posted 6 months ago
MultiplySides[a == b, c] 

$\begin{array}{cc} \{ & \begin{array}{cc} a c=b c & c\neq 0 \\ a=b & \text{True} \\ \end{array} \\ \end{array}$

MultiplySides[a == b, c, GenerateConditions -> False]

$a c=b c$

Posted 6 months ago

function Map is what I am looking for. Thanks.

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