When 2/3 is added to a certain number, the sum is 3 greater than twice the number?

Question

Part A: Set up an equation using n to represent the number.


Part B: Solve the equation in Part A for n.

Answer

N + 2/3 = 3 + 2N

The rule is you can do any valid operation on both sides of an equation and it will still be equal. Subtract N.

2/3 = 3 + N  Subtract 3.

-7/3 = N

Check:
-7/3 + 2/3 = 3 - 14/3

-5/3 = 9/3 - 14/3 = -5/3  <--  PROVED

Answer

2/3 + n - 3 = 2n ## subtract n
2/3 - 9/3 = n
n = -7/3

When 2/3 is added to a certain number, the sum is 3 greater than twice the number?

Answers (2)