3(y - 3) = 3*2/7(x -(-9))
3y - 9 = 2/7(x + 9) distribute the 3 and convert the
- - to +
21y - 63 = 2(x + 9) multiply by 7 on both sides
21y - 63 = 2x + 18 distribute the 2
21y = 2x +18 + 63 add 63 to both sides
21y = 2x + 81 combine like terms
y = 2/21x + 81/21 divide both sides by 21