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a) 6x+8=2x, 8=-4x, x=-2

b) q² + 7q -3q - 21, q² + 4q - 21

First you need to draw a set of axis and choose a sensible scale, This is detrmined by parts of the equation such as the x and y intercept. Then what we need to do is to make a table of values. We can do ...