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Mathematics 13 Online
OpenStudy (anonymous):

Three times a number, x, plus four times a number, y, equals 81. Two times x minus four times y equals -46. Find the numbers by setting up a system of linear equations and solving the system using the elimination method.

OpenStudy (anonymous):

3x+4y=81 2x-4y=-46 solve these equations by adding the two equations. and then find y

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