Question

The sum of 4,7, and a number amounts to 16 find the number

Answer 1

The unknow number is 5.

Explanation and Check part below

Hope this helps :)

Explanation:

1. To solve, first wrote it into an equation. Also, the letter x will stand for the unknown number.

4 + 7 = 11

11 + x = 16

2. Isolate the varable by subtracting 11 from both sides of the equation.

11 + x = 16

- 11 - 11

x = 5

The unknow number is 5.

Check:

11 + 5 = 16

16 = 16

True statement.