(х+10)•(х-6)-(х-1)•(х+1)=1

Question

(х+10)•(х-6)-(х-1)•(х+1)=1

Answer 1

x^2 + 4x - 60 - x^2 + 1 = 1 
4x - 60 = 0 
4x = 60
x = 60/4 
x = 15