Answer:
5
Step-by-step explanation:
Simplify the equation:
2m -10 = -3m +15
Add 3m
5m -10 = 15
Add 10
5m = 25
Divide by 5
m = 5
20 years
4x² + 11x - 3 = 0
(4x-1)(x+3) = 0
x = 1/4, -3