Answer:
10 – 13 years
x = 15
Explanation:
The angle is 90 degrees, so 3x qnd 4x - 15 combined would equal 90.
Combining like terms would turn the equation into 7x-15 = 90.
Add 15: 7x = 105
Divide 105 by 7, and x = 15
whatever your opinion is bro
effects is the correct answer
I really don't know the answer, I just don't know what language you're using, I'm so sorry
