SAT I 一日一問:2014年3月18日
The correct answer is E
Explanation
When 3 is subtracted from x, the result is x minus 3. The square root of this difference is?. When 5 is added to?, the final result is 9. This can be written as+5 = 9. Subtracting 5 from both sides gives the equation??= 4. Squaring both sides of this equation gives x minus 3 = 16, or x = 19.