Question

Решите уравнения , а)27 х-14 х+ 38+15 х=990, б) 2472:(15-х:48)=206

Answer 1

17x - 14x=13x 13x +15x = 28x 28x =990 - 38 28x = 952 x = 952 : 28 x =34

Answer 2

А)27x-14x+38+15x=990
27x-14x+15x=990-38
28x=952
x=34
б)2472:(15-x:48)=206
15-x:48=2472:206
15-x:48=12
-x:48=12-15
-x:48=-3
x=48×3
x=144