Math
posted by Keisha .
If in the set A, 3x4 and B 2x+5, with X is an intersect between the two sets, how do i find for x?? I already know the ans is 9, but need help with the working.
Do i just bring the 4 over to 5 and change the sign then add.

I am confused by your mention of "sets". I think A and B as the equations for straight lines.
If 3x 4 = 2x +5, then x = 9
That somes from setting the two equations equal to each other and solving for x