45x & # 10135; (x-0.8) = 50 solution equation

45x & # 10135; (x-0.8) = 50 solution equation

45x➗(x-0.8)=50
9x(x-0.8)=10
9x^2-7.2x=10
x^2-0.8x=10/9
(x-0.4)^2=10/9+0.16=11.44/9
x-0.4=±√11.44/3
x1=0.4+√11.44 x2=0.4-√11.44 .