Question

The length of a rectangle is 1 inch greater than its width. If the dimensions are doubled, its area increases by 36 square inched. Which equation could be used to find its dimensions?
L = W + 1

Since area = L * W

2L(2W) - LW = 36

Substitute W + 1 for L in second equation to find L. Put that value in the first equation to find W. Check by putting both values into the second equation.

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