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rewrite the following equation in the form Ax+By=C
 y=-x+9             ........     y=5x-4



Rewrite the following in form of y=mx+b 
x+y=5           ...........          2x+y=-4

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Helpme1viz
Ax+By=C
> y=-x+9
x+y=9
> y=5x-4
(-5x+y=-4)-
5x-y=4

y=mx+b
>x+y=5
y=-x+5
>2x+y=-4
y=-2x-4

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