What is the solution to the proportion 6/10 = 9/x
a. 30
b. 15
c. 13
d. 5.4

The answer is B 15

First flip both side: 10/6 = x/9
Find for x:
(10/6) = ×/9
(10/6)×9 = x
x = 15

6/10 - 9/x = ?

9/x (simplify )

6/10 - 9/x = ?

3/5 (simplify this as well)

3\5 - 9/x=?

L (denominator) : 5

R (denominator): x

LCM (Least common multiple): 5(x)

Switch the denominators around

L(denominator): x

R(denominator): 5

3(x) - 45 / 5(x)

3(x) ➡3(x - 15)

3(x) - 15 / 5 (x) = ?

3(x) - 15 = ?

3 = ? (lets solve this problem)

x - 15 = ?

Now, lets add ( + ) the number 15 from each of the side sides of the problem that is shown above. (x - 15 = ?)

Finally, we get our result of this problem

x = 15

< i think this is the answer unless i did my math wrong