Answer:
x = 15; m<(3x) = 45; m<(2x + 15) = 45
Step-by-step explanation:
The measures of the angles measuring 3x and 2x + 15 add up to 90 degrees.
3x + 2x + 15 = 90
5x + 15 = 90
5x = 75
x = 15
m<(3x) = 3 * 15 = 45
m<(2x + 15) = 2 * 15 + 15 = 30 + 15 = 45
