Реши уравнения 72-х =18 ·3 . 37+х=64-19 х -290=470 +230 15·х= 630: 7

72-x=18*3
72-x=54
x=72-54
x=18

37+x=64-19
37+x=45
x=45-37
x=8

x-290=470+230
x-290=700
x=700+290
x=990

15*x=630:7
15*x=90
x=90:15
x=6

72-x=54 37+x=64-19
x=72-54 37+x=45
x=18 x=45-37
x=8

x-290=470+230 15*x=630:7
x+290=700 15*x=90
x=700+290 x=90:15
x=990 x=6