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7x-x2 = x(7-x)
Assume you mean -7x-2=0 solve for x -7x-2=0 -7x=2 -x=2/7 X=-2/7
In 7x+7, x is a variable.
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y = -7x 0 = -7x 0 = x x-intercept point is (0, 0).