If 3x + 5 = 20, what is the value of 2x + 10?
A) 10
B) 15
C) 20
D) 25
E) 30
Answer: C) 20
Explanation:
- Solve for x in the given equation: 3x + 5 = 20.
Subtract 5: 3x = 20 − 5 = 15.
Divide by 3: x = 15 ÷ 3 = 5.
- Substitute x = 5 into the expression 2x + 10:
2x + 10 = 2(5) + 10 = 10 + 10 = 20.
The value of 2x + 10 is 20, so the correct answer is C.