Question

The sum of a number and the opposite of 3 equals 4

Answer 1

Assume that the number is x

The opposite of 3 is -3

Since the sum of the number and the opposite of 3 equals 4

Therefore:

`x+(-3)=4`

Remember (+)(-) = (-), so

`x-3=4`

To find x we need to move 3 to the other side by adding 3 to both sides

`\begin{gathered} x-3+3=4+3 \\ x=7 \end{gathered}`

Since x represents the number, so

The number is 7

Let us check the answer

7 + -3 = 4

The answer is correct