№434
1) 13p + 37p, p = 14; 50p = 50 * 14 = 700
2) 72b - 43b, b = 54; 29b = 29 * 54 = 1566
3) x = 678; 2x = 1356
4) c = 47; 50c + 259 = 50 * 47 + 259 = 2609
№435
1) 34x + 66x, x = 8. 100x = 100 * 8 = 800.
2) 54a-39a, a = 29. 15a = 15 * 29 = 435.
3) 18m-5m+7m, m = 394. 20m = 20 * 394 = 7880.
4) 19z-12z+33z-192, z = 82. 40z = 40 * 82 = 3280.