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Fraction cross multiplication


Definition

Given an equation between two fractions or rational expressions, one can cross-multiply to simplify the equation or determine the value of a variable.


Problems Solved

$\frac{x^2-1}{3}=\frac{5\left(x+2\right)}{4}-4$
$\frac{1}{x}=\frac{1}{x+2}+\frac{1}{7}$
$\frac{x+2}{3}=\frac{2x-1}{14}$
$\frac{x}{x^2-8}=\frac{2}{x}$
$\frac{x+1}{x}=\frac{2x+1}{x-1}$
$\frac{x\left(x+3\right)}{5}-1=\frac{x+2}{4}$
$5\div a-3=4\div a+6$

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