Express 5x=-8y in the form of ax+by+c=0
a,b, and c are near the front of the alphabet so they
represent particular constant numbers. x, y and z are
near the end of the alphabet so they are variables
and stay the letters they are:
Get 0 on the right by adding 8y to both sides
5x+8y=0
c can be 0, so add 0 to the left side and nothing
to the right side:
5x+8y+0=0
As you see it is in that form for the 5 is the a,
the 8 is the b, and the c is the 0
5x+8y+0=0
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ax+bx+c=0
Edwin
