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Subtract equation (1) from equation (2) and solve the resulting equation for r. Substitute this value into equation (1) and solve for s. Now find the coordinates of O. You now know a, b, c, d, e, f, r and s and again using the distance formula
Subtract (3) from (4) and solve for t. Substitute this value into (4) and (5). Subtract (4) from (5) and solve for u. Substitute the values you have for t and u into (3) and solve for v. Penny  


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