Write the following using algebraic notation, using the letter x for any unknown numbers:
I think of a number, add seven, then divide by five.

(x+7)÷5

Step-by-step explanation:

since the number is unknown, it becomes X. Because we first add 7 then divide by 5, the expression will be a bracketed (X+7), followed by the division by 5. This makes sense because of the BODMAS rule to which, in coherence with the BODMAS rule, we first solve the expression in the brackets then move on outside them.

a negative exponent is translated as follows:

so, we have