Angelina W.
asked • 02/10/13solve:
6x-4y=56
2x+6y=-40
Robert J. answered • 02/10/13
Certified High School AP Calculus and Physics Teacher
6x-4y=56 =>/2, 3x-2y = 28 ......(1)
2x+6y=-40 =>/2, x+3y = -20 ......(2)
(2)*3 - (1): 11y = -88
y = -8
x = -20-3y = 4
Answer: x = 4, y = -8
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why would you divide by 2 on the equations?
02/11/13