I genuinely need to understand how to do these questions. Please help with steps.

1.Alice is selling lemonade and fresh-squeezed orange juice at a booth. She sells cups of lemonade for $1 each and cups of orange juice for $3 each. Write an expression that represents the amount of money that Alice earns selling drinks.

2. Evaluate 2x − 4 for x = 9.

3. Evaluate −b + 8 for b = 3.

4. Find the value of the expression 12x+3 if x = 12.

5. For the equation y = 3x + 4, find the value of y if x = 2.

6. The expression $25 + $10h gives the amount of money that Stephanie earns per day, where h is the number of hours she works. How much does she earn if she works 4 hours?

Simplify each of the following expressions:
7. 3(x + 2) + 4(x − 2)
8. 2(x + y) − 3(x + y)
9. −(y + 8) + 4(6 − y)
10. 2(4x + 3) − 3(x + 1)