1. Set equations equal to each other so 5x-9=2x+6 2. Put x's on one side so that 3x=15 3. Divide by 3 so that x=15 4. Substitute 15 in for x so that y=2(15)+6 5. Solve for y so that y=36 6. Thus the equations intersect at (15,36)
Second question:
1. Since for lines y=mx+b, and m=slope=3 you only need to write an equation with slope 3 2. y=3x+b, b can be any number
