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OpenStudy (anonymous):
Solve the system of equations. 3x - 4y = -10 and 5x + 8y = -2 A. (1, 2) B. (2, 1) C. (1, -2) D. (-2, 1)
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OpenStudy (phantom):
D , multiply eqn 1 by (-2) and add it to eqn 2,,solve n get x=-2 thats only available in D..this is the shortcut to do this..remember when u are given options you often dont need to solve for both variables
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