Rearrange formulas to highlight a chosen quantity across the expression types studied.
Rearrange a formula to isolate a linear target variable in one term
Problem
Rearrange \(A~=~lw\) to isolate \(l\), including any required condition.
Big Picture
What this problem is really about
Identify the operation directly attached to the target variable and undo it with the same operation on both sides. Here the target is one factor in a product, so divide by the other factor rather than subtracting it or reversing the quotient. State that the divisor must be nonzero, then verify by rebuilding the original product.
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