Final answer:
To solve the equation -21 + 5y = 12 for y, you add 21 to both sides, divide by 5, and find that y equals 6.6.
Step-by-step explanation:
To solve the equation -21 + 5y = 12 for y, follow these steps:
- Add 21 to both sides of the equation to move the -21 over to the right side, which gives us 5y = 12 + 21.
- Combine the constants on the right side: 5y = 33.
- Divide both sides of the equation by 5 to isolate y, yielding y = 33 / 5.
- Simplify the fraction to find that y = 6.6.
The solution to the equation is y = 6.6.