algebra

length and width of a rectangle
A=198 in
width =x
length =x+7

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  1. What are we doing?
    Are we finding the value of x?
    if so, then ....
    x(x+7) = 198
    x^2 + 7x - 198 = 0
    (x-11)(x+18) = 0
    x = 11 or x = -18, but clearly x > 0

    so x = 11

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