Решите 54y-36y-9=153, (15 и-21) * 3+27=234, (36t+98) : 14=25, (23x+30x+42) : 6=21

Решим уравнения:

1) 54 * y - 36 * y - 9 = 153;

18 * y - 9 = 153;

18 * y = 153 + 9;

18 * y = 162;

y = 162/18;

y = 81/9;

y = 9;

2) (15 * u - 21) * 3 + 27 = 234;

(15 * u - 21) * 3 = 234 - 27;

(15 * u - 21) * 3 = 207;

(15 * u - 21) * 3/3 = 207/3;

15 * u - 21 = 69;

Разделим уравнение на 3.

5 * u - 7 = 23;

5 * u = 23 + 7;

5 * u = 30;

5 * u/5 = 30/5;

u = 6;

3) (36 * t + 98) / 14 = 25;

36 * t + 98 = 25 * 14;

36 * t + 998 = 350;

36 * t = 350 - 998;

36 * t = - 648;

t = - 648/36;

t = - 18;

4) (23 * x + 30 * x + 42) / 6 = 21;

(53 * x + 42) / 6 = 21;

53 * x + 42 = 6 * 21;

53 * x + 42 = 126;

53 * x = 126 - 42;

53 * x = 84;

x = 84/53;

x = 1 31/53.