X/2 + 90(x) – 2x x -> 10​

x/2 + 90(x) – 2x

x → 10

10/2 + 90(10) – 2(10)

= 10/2 + 900 – 20

= 10/2 + 880

= 10/2 + 1.760/2

= 1.770/2

= 885

:)

(10)/2 + 90(10) – 2(10)

= 5 + 900 – 20

= 5 + 880

= 885