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OpenStudy (anonymous):
Please help! What is the value of the y variable in the solution to the following system of equations? 5x + 4y = 1 4x + 3y = -1 Choices: -7 7 9 -9
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OpenStudy (nurali):
5x + 4y = 1---------(1) 4x + 3y = -1--------(2) in equation (1) 5x + 4y = 1 5x=1-4y x=1-4y/5--------(3) put 'x' in equation (2) 4x + 3y = -1 4(1-4y/5)+3y=-1 4-16y/5+3y=-1 4-16y+15y=-5 4-y=-5 y=9
OpenStudy (anonymous):
Thanks!
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