80*в-3*90+430=1600:2 уравнения

Question

80*в-3*90+430=1600:2 уравнения

Answer 1

80в-270+430=800
80в-270=370
80в=640
в=8

Answer 2

80в-270+430=800
80в+160=800
80в=800-160
80в=640
в=640/80
в=8