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Mathematics 23 Online
OpenStudy (anonymous):

Solve, using linear combination. 3x + y = 4 2x + y = 4

OpenStudy (amistre64):

take the coefficient matrix and row reduce it

OpenStudy (amistre64):

rref{{3,1,4},{2,1,4}} plug that into wolframalpha.com and read off the right side column.

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