<PRE><B>Question 179126</B>
y = 3x + 4          --------(1)
y = 1.5x + b        --------(2)

intersect at the point(5,19) means 5 and 19 should be able to put in the x and y in both eqaution.
But the first equation is useless.
Use only the second equation
Then
19 = (1.5)5 + b
19 = 7.5 + b
Then
b = 19 - 7.5 = 11.5</PRE>