Let a and b be the solutions to 7x^2 + x - 5 = 6x^2 - 11x - 2. Compute (a - 4) + (b - 4).
Simplify
x^2 + 12x - 3 = 0
Sum of the roots = a + b = -12
(a - 4) + ( b - 4) = (a + b) - 8 = -12 - 8 = -20
+1507 
