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OpenStudy (anonymous):
solving linear systems using substitution method 2x+y=9 x+y=4
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OpenStudy (anonymous):
2x+y=9 -2(x+y=4 so 2x+y=9 -2x-2y=-8 cross out the x's -1y=1 y=-1 then just use the first problem and put in the y to get the x and wuallah!
OpenStudy (anonymous):
i dont understand , can you draw it out ?
OpenStudy (anonymous):
i just did it lol
OpenStudy (anonymous):
after -2x+y=-8 i added +2 on both sides and got -2y over 2 + 10 over 2 and i came out with 10 over 2 equals 5
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