The answer to your problem is 6
Answer:
or 
Step-by-step explanation:

You have only two variables X and Y to signify the angles
Together they must equal 90, because its a right triangle and one angle is 90
2X+4=Y
X+Y=90
Solve for Y
Y=90-X
Set the Y's equal to each other
2X+4=90-X
Isolate the X
3X=86
X=~28.66
Y=~61.34
Answer:18
Step-by-step explanation:
Answer:

Step-by-step explanation:
The equations are


Substituting the first equation in the second we get





So, the required values are 