Find an integer value of x such that when 3x−39 is divided by 2x, the quotient is 1 and the remainder is 50.

(3x-39)/2x = 1, Re = 50.

Quotient*Divisor + Re = Dividend.

1*2x + 50 = 3x-39
2x-3x = -39-50 = -89
-x = -89
X = 89.