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So I just had this controversial question on my maths exam and it said "express this equation in terms of $x$."

To make it simple, let’s assume that the equation was $x+y=2$.

If we are expressing the equation in terms of $x$, then would it be $y=2-x$ or $x=2-y$?

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1 Answer

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Expressing an equation in terms $x$ means to express the quantity you're finding in terms of $x$, the variable.

For instance, if you're given an equation: $x + 4 = y - 1$, and asked to express it in terms of $x$; Then $y = x + 5$, would be the required expression.

Thus for your question, $y = 2 - x$, would be the correct expression.

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