-3
Standard form is y=mx+by=3x+5 is already in standard form.
6
3x = y
Not entirely sure what standard form is, but... probably y = x + 5
The equation of the line is written in the standard form, y = mx+c
7x+y=6
2x+y=1
-3
5x + y = 5
x + y = 3
9
Standard form would be x and y on one side of the equal sign with no coefficients. x-y+6=0 in standard form would be: x-y=-6.