AlgebraEasyStarting amount from a halving and a gain
Algebra practice question
Lena gave half of her sweets to her brother and then received 3 more sweets, leaving her with 8. How many sweets did she start with?
Answer: 10
n/2 + 3 = 8 gives n/2 = 5, so n = 10.
Common wrong answers
- If you answered 5
- 5 is the amount she had after giving half away.
- If you answered 16
- 16 doubles 8 without removing the 3.
- If you answered 22
- 22 adds 3 and doubles instead of subtracting 3 first.
More Algebra questions
- Easy
If 3x + 7 = 22, what is the value of x? - Easy
If x/4 = 9, what is the value of x? - Easy
The function f is defined by f(x) = 6x − 5. What is the value of f(3)? - Easy
The perimeter P of a rectangle with length l and width w is given by P = 2l + 2w. Which of the following expre… - Easy
Which equation defines the function f? - Easy
In the xy-plane, the graph of the equation y = 4x − 12 crosses the x-axis at the point (a, 0). What is the val…
Not affiliated with the College Board. SAT is a trademark of the College Board.