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OpenStudy (anonymous):
solve each system by elimination 6q - r + 2s = 8 2q + 3r - s = -9 4q + 2r + 5s = 1
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OpenStudy (precal):
Multiply -3 to 2nd equation -3(2q+3r-s=-9) -6q-9r+3s=27 6q-r+2s=8 -10r+5s=35 multiply 2 to equation 1 and then add that to 3rd equation.
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