Question

28360:(u-52890)=40

Answer 1

28 360 : (u -52 890)=40

u- 52 890 = 28 360 :40

u- 52 890 = 709

u = 709 + 52 890 

u = 53 599

Answer 2

28360:(u-52890)=40

28360/40=u-52890

709=u-52890

u=709+52890

u=53599

Ответ. u=53599