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OpenStudy (anonymous):
What is the value of the x variable in the solution to the following system of equations? 7x - 2y = 21 4x + y = 57 21 -21 9 -9
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OpenStudy (anonymous):
Multiply the 2nd eqn by 2. It givs 8x+2y=114 Adding this with the 1st eqn gives 15x=135 x=9
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