1). Решить уравнение: 1) 29х-15х+16=100; 2) 11у+32у-127=45; 3) 15z+8z-59=102; 4) 9t+4t-286=0;

Решение:

* 29х - 15х + 16 = 100;

29х - 15х = 100 16;

14х = 84;

х = 84 / 14;

х = 6.

* 11у +32у -127 = 45;

11у +32 у = 45 + 127;

43у = 172;

у = 172 / 43;

у = 4.

* 15z + 8z -59 = 102;

15z + 8z = 102+59;

23z = 161;

z = 161 / 23;

z = 7.

* 9t + 4t - 286 = 0;

9t + 4t = 286;

13t = 286;

t = 286 / 13;

t = 22.

* 14x + 9x + 88 = 272;

14x + 9x = 272 - 88;

23x = 184;

х = 184 / 23;

х = 8.

* 25x - 16x + 54 = 162;

25x - 16x = 162 - 54;

9x = 108;

х = 108 / 9;

х = 12.

Ответ: 1) х = 6; 2) у = 4; 3) z = 7; 4) t = 22; 5) х = 8; 6) х = 12.