49532 = 40000 + 9000 + 500 + 30 + 2
1102350 = 1000000 + 100000 + 2000 + 300 + 50
7x - 3.6/7 x + 7/9 x = 7*63/63 x - 3.6 * 9 / 63 x + 7*7/63 x = ( 441 - 32.4 + 49)/63 x = 457.6/63 x = 4577/630 x
3х + 4у = 55
3х = 55 - 4у 4y = 55 - 3x
х = (55 - 4у)/3 y = (55 - 3x)/4