The point $(a, b)$ lies on the line with the equation $3x + 2y = 12.$ When $a = 4$, what is the value of $b$?
"a" = x = 4
So
3(4) + 2y = 12
12 + 2y = 12 subtract 12 from both sides
2y = 0 divide by 2 on both sides
y = 0 = " b "
Thanks so much that was fast!
OK......
+159 
