Answer:
the right answer to this question is
X= 7.0 aproximately
Step-by-step explanation:
to find the value of x, first of all, we need to know that this triangle is a right triangle and we have one angle, and in the adjacent of the angle, we have a value.
So to find the value of x, we need to use one of the trigonometric functions.
we can see that x is in the opposite on the angle and knowing so; we can use the function Tan.
Remembering
Tan of an angle is equal to 
in other words, we have
°= 
replacing we got

now we just need to solve this.
10 is dividing in the right part of the equation (the "=" is the "center" to know where is right and left) so in the left part will be multiplicating; so with this we have

finally we just need to resolve the parenthesis

replacing we have


so 