4. Реши уравнения:147 300 : 100 = х - 3300 : х = 97 612 – 761267 343 – х = 6309 :9х: 420 = 13 256 — 3314 - 4(1512 – 504 . 3) + a = 12 447 : 27а: 165 613 = 413 : 2005c: 210 = 18 741 – 15 9864428 : a = 50 354 + 7210192 516 – a = 12 014 - 956 000 – 7792 = 92 .х