1) х * 50 = 72
х = 72 : 50
х = 1 целая и 22
50
2) 2 * х + 356 = 900
2х = 900 - 356
2х = 544
900
356
544
х = 544 :2
х = 274
3)х - 206 = 100 + 45
х - 206 = 145
х = 206 + 145
х = 351
1) х * 50 = 72
х = 72 : 50
х = 1 целая и 22
50
2) 2 * х + 356 = 900
2х = 900 - 356
2х = 544
900
356
544
х = 544 :2
х = 274
3)х - 206 = 100 + 45
х - 206 = 145
х = 206 + 145
х = 351