SAT Math Multiple Choice Question 84: Answer and Explanation
9. t + 4 = t - 5
In the equation above, what is the value of t ?
- A. 4
- B. 9
- C. 18
- D. 36
Correct Answer: D
D Use a calculator to translate the fractions into decimals. t + 4 = t - 5 becomes 0.5t + 4 = 0.75t - 5. Subtract 0.5t from both sides to get 4 = 0.25t - 5, and then add 5 to both sides. This results in 9 = 0.25t. Use a calculator to divide! t = 36; therefore, the correct answer is (D).