Given
Grayson and four of his friends had a car wash to earn extra money & split the profits
grayson got an extra $18 to repay his parents. & grayson got $32.
find out the total money did they split among themselves
To proof
let the total money earned by the five friends = x
grayson got an extra $18
total grayson got $32
the money is divided in the equal parts in each friend =

now the algebraic equation becomes
32 = 18 +

(32- 18) 5 =x
by solving the above equation
we get
$70 = total money (x)
money is divided in the equal parts in each friend = $14
Hence proved