(139+275)x110=(139x110)+275xn

(139+275)×110=(139×110)+ 275 × n
=>(414)x 110 =(15290)+275n
=>45540 - 15290 =275n
=>30250 ÷ 275 = n
=>110 = n

(139+275)x110=(139x110)+275xn
414 x 110 = 15290 + 275 x n
45540 = 1865n
n = 45540/ 1865
n = 24,4