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Mathematics 8 Online
OpenStudy (maheshmeghwal9):

Please solve:)

OpenStudy (maheshmeghwal9):

OpenStudy (maheshmeghwal9):

Please write steps:)

OpenStudy (unklerhaukus):

\[2x+3y=7\] \[3y=-2x+7\] \[y=\frac{-2}3x+\frac73\] the solutions is a straight line the gradient is \(\frac{-2}3\) and the y-intercept is \((0,\frac73)\) the x-intercept is \((\frac{-7}2,0 )\)

OpenStudy (maheshmeghwal9):

can't we solve it by substitution or elimination method?

OpenStudy (maheshmeghwal9):

if yes then how?

OpenStudy (anonymous):

well if you add both equations you get a single equation with 2 unknowns still and if you subtract them they cancel leaving nothing because they are the same!

OpenStudy (anonymous):

\[4x+6y=14\]

OpenStudy (anonymous):

\[6y=14-4x \rightarrow y=-4/6x+14/6 \rightarrow y=-2/3x+7/3\]

OpenStudy (anonymous):

so you get the same answer

OpenStudy (maheshmeghwal9):

k! thanx:)

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