1) 16*4 х=100 6 х+3 х=1836 №2 2) (71-68 два) + 43

1) 16 * 4 х = 100;

64 х = 100;

х = 100 : 64;

х = 1,5625;

16 * 4 * 1,5625 = 100;

64 * 1,5625 = 100;

100 = 100;

6 х + 3 х = 1836;

9 х = 1836;

х = 1836 : 9;

х = 204;

6 * 204 + 3 * 204 = 1836;

1224 + 612 = 1836;

1836 = 1836;

2) (71 - 682) + 43 = - 611 + 43 = - 568.