If 3x + 7 = 22, and 2y = x - 3, what is the value of y?
3x + 7 = 22
2y = x - 3
y = ?
Step-by-Step Solution:
- Solve for x: 3x + 7 = 22
- 3x = 22 - 7 = 15
- x = 15 ÷ 3 = 5
- Substitute x into second equation: 2y = 5 - 3
- 2y = 2
- y = 1
Correct Answer: B) y = 3
💡 Tip: Always solve for one variable first, then substitute!