1) 72 - x = 18*372 - x = 54-x = 54 - 72-x = -18x = 18
2) x/8 = 130/270x = 130/270 * 8x = 3.7
3) 15*x = 630/715x = 90x = 90/15x = 6
4) 400/x = 1000/10400 = 100x/10400 = 10xx = 400/10x = 40
Ответ:1) x = 182) x = 3.73) x = 64) x = 40.
1) 72 - x = 18*3
72 - x = 54
-x = 54 - 72
-x = -18
x = 18
2) x/8 = 130/270
x = 130/270 * 8
x = 3.7
3) 15*x = 630/7
15x = 90
x = 90/15
x = 6
4) 400/x = 1000/10
400 = 100x/10
400 = 10x
x = 400/10
x = 40
Ответ:
1) x = 18
2) x = 3.7
3) x = 6
4) x = 40.