Question

(1/4) - (1/x) = 1/(x+15)
Solve for x by making a common denominator

Answer 1

please, note that common denominator is 4*x*(x+15)

Answer 2

do I distribute 4 and x into the parentheses?

Answer 3

No I don't think.
I think you have perform this calculus:
\[\frac{... }{ 4*x*(x+15) }-\frac{ ... }{ 4*x*(x+15) }=\frac{ ... }{ 4*x*(x+15) }\]

Answer 4

now I ask you what is [4*x*(x+15)]/4?

Answer 5

@kobeni-chan

Answer 6

x(x+15) right?

Answer 7

that's right, that is your first numerator, namely the leftmost numerator

Answer 8

now I ask you what is [4*x*(x+15)]/x?

Answer 9

4(x+15) right? I don't think I'm supposed to take x out of the parentheses

Answer 10

that's right! that is your second numerator, namely at middle position: