Please solve the math problem... I will mark you brainliest

Answer: x=49
Step-by-step explanation:
Triangle's internal angles produce a sum of 180, and this is a right triangle. This means we can write an equation for x:
180-(3x-8)+90+x=180
And then just solve for x:
-3x+8+90+x=0
-2x+98=0
2x=98
x=49