Question

Question #8304a

Answer 1

`y=x-7`

Explanation:

Mathematically speaking, the word 'sum' loosely means 'put with'. Using mathematical symbols this is written as +

Let the answer be `y`

Let the unknown number be represented by `x`

Breaking the question down into its component parts:

What is ;`color(white)(.)" ".....................->y=?`
the sum of of -7`" "...........->y=-7+`
and; `" "............................->y=-7+?`
a number;`" "....................->y=-7+x`

Writing this the conventional way we have:

`y=x-7`