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OpenStudy (anonymous):
What is the value of the y variable in the solution to the following system of equations? 5x + 4y = 1 4x + 3y = -1 A. -7 B. 7 C. 9 D.-9
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OpenStudy (ivettef365):
You multiply the first equation by 4 and the second equation by -5
OpenStudy (ivettef365):
Then you get: 20x +16y =4 -20x -15y = 5
OpenStudy (ivettef365):
When you subtract then you eliminate the x and you have y = 9
OpenStudy (anonymous):
thanks!!
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