Question

Seven times a number, added to 3, is 45. Find the number.

Answer 1

the number is 6

since the number was lastly added to by 3, you subtract 3 from 45 to get 42

then you will divide 7 from 42

you will get 6

when you do an equation one way, to unsolve it you just go backwards

Answer 2

6

Explanation:

The setup looks like this

X=the number

7X
`7x+3=45`

Subrtact the 3 from 45

`7x=42`

Now we need to get rid of the 7 on the left, so in order to do that, we divide seven from both sides

`(7x)/(7)= (42)/(7)`

Now we have our answer

`x = 6`