Question

so in a math equation that looks for example like this 2b+5q=9+4q

does both q's= the same thing

Answer 1

yes. you have 5 q's on one side and 4 q's on the other side of the equation
they are "similar terms"

Answer 2

so 5 xq and 4x q =? but if i multplid 4 xq and 5x q = is the same what ever nuber it ends up to be?

Answer 3

if you have an equation with one unknown, for example:
20+5q=9+4q
we can combine like terms: add -4q to both sides
20 + 5q - 4q = 9 +4q - 4q
on the right we have 4 q's take away 4 q's leaving 0 q's or just 0
20 + 5q - 4q = 9 +0
9+0 is just 9, so this is
20 + 5q - 4q = 9
on the left side you have 5 q's take away 4 q's leaving 1 q
20 +1q =9
(1q is normally written as "q")
20 + q = 9

now add -20 to both sides and you get
q= 9-20
q= -11

however, if you have 1 equation and 2 unknowns , like your equation
we cannot solve q for a specific number. But we can simplify things
2b+5q=9+4q
q= 9 - 2b
(do you see how to do that ?)