It is written in the form of an equation that combines an algebraic expression using addition, subtraction, multiplication or division.
The value of a variable in the subject of the formula can be obtained when the value of other variables is given.
Given \(Q= \dfrac{2v}{-v +u}\), calculate the value of \(u\), where \(v=2, Q= 4\).
\(\begin{aligned} \\\space4 &= \dfrac{2(2)}{-2 + u} \\\\ 4 (-2 +u) &= 4 \\\\ -8 + 4u &= 4 \\\\ 4u &= 12 \\\\ u &= \dfrac{12}{4} \\\\ u &=3. \end{aligned}\)
It involves changing the subject of a formula, a combination of basic mathematical operations, square and square root.
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