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OpenStudy (ineedhelpnow):
solve the linear system 3x-4y=8 4x+5y=10
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OpenStudy (anonymous):
multiply eq 1 by 5 and eq 2 by 4 then add both eq. we get 31x=80 or, x=80/31 substitute it in either equation and solve for y.
OpenStudy (ineedhelpnow):
nvm (3x-4y=8)5 (4x=5y=-10)4 ------------- 15x-20y=40 16x+20=-40 ------------- 31x=0 -- -- 31 31 _______________ x=0 3(0)-4y=8 _______________ -4y=8 -- -- -4 -4 ------------- y=-2
OpenStudy (anonymous):
In question's second eq there is +10 not -10.
OpenStudy (ineedhelpnow):
oops! wrote it wrong the first few times. 4x+5y=-10.
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