(k:40):30=120. 410860+m*20=489000. 75880:(n-29965)=70

Question

(k:40):30=120. 410860+m*20=489000. 75880:(n-29965)=70

Answer 1

(k:40):30=120
k:40=120•30
k:40=3600
k=3600•40
k=144000
(144000:40):30=120
120=120