Answer: 1.75
Step-by-step explanation:
To open up the parenthesis, you need to multiply -3 and -2u, and then -3 and 5. So -3 * -2u = 6u and -3 * 5= -15.
1. 6u-15+3.5=-1u
2. Combine like terms 6u-11.5=-1u
3. Add 11.5 to both sides 6u = 10.5
4. Divide both sides by 6 to get u
5. u = 1.75
