Question

(х-4)(х-5)-х(х-6)=10

Answer 1

x^2-5x-4x+20-(x^2+6x)=
x^2-5x-4x+20-x^2-6x=
-15x

Answer 2

( x - 4 )( x - 5 ) - x( x - 6 ) = 10
x^2 - 5x - 4x + 20 - x^2 + 6x = 10
- 9x + 20 + 6x = 10
- 3x = - 10
x = 10/3
x = 3 1/3