Answer:
If you were to make these two equations in slope intercept form, here's what it would be like;
First the formula for slope intercept form is, y = mx + b
where m represents the slope and b is the y intercept(where the line meets the y axis)
First equation;
x + y = 3
we need to isolate y so we subtract x from both sides
-x -x
y = -x + 3 (we put the -x before the 3 because that's how the formula is formatted)
Second equation;
2x + 3y = 7
Isolate y by subtracting 2x away from both sides
-2x -2x
3y = -2x + 7, y is not fully isolated because it has a coefficient and it's supposed to be just y, so we divide both sides by 3:
/3 /3
y = -2/3x + 2 1/3