Question

Erin and Jamie are collecting shells while the tide is out. Erin has 27 shells, and she has 9 more than Jamie. Write and equation for this situation and find how many shells Jamie has collected.

A. 27 = j + 9; Jamie collected 36 shells
B. 27 + 9 = j; Jamie collected 36 shells
C. 27 = j + 9; Jamie collected 18 shells
D. 27 = j – 9; Jamie collected 36 shells

Answer 1

C. 27=j+9; Jamie collected 18 shells.

Explanation:

First, you do is switch sides.

`\displaystyle j+9=27`

Then, you subtract 9 from both sides.

`\displaystyle j+9-9=27-9`

Simplify, to find the answer.

`\displaystyle 27-9=18`

Therefore, Jamie got collected of 18 shells.

`\huge \boxed{18}`, which is our answer.

The correct answer is C.

Answer 2

C.

Explanation:

If Erin has 9 more shells than Jamie, then 27 minus 9 would be equivalent to the amount of shells Jamie has.

This can be represented by:

`27-9=j`

Which can be rewritten as:

`27=j+9`

by adding 9 to both sides.

To solve, subtract 9 from 27.

`27-9=18`

Jamie has collected 18 shells.