r=8
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s = -2 -4r
so 26 = 4r so r = 6½
r=21
4r+3 = 3-2 4r = 3-3-2 4r = -2 Divide both sides of the equation by 4 to find the value of r: r = - 1/2
Without prior knowledge of the value of q or r, it is impossible to calculate the answer to this equation.