Решить уравнения (k+5) * 7-54 = (k+5) * 4 17 * (c-2) - 36=19 + (c-2) * 12

1) (k + 5) * 7 - 54 = (k + 5) * 4;

7 * (k + 5) - 54 = 4 * (k + 5);

7 * k + 7 * 5 - 54 = 4 * k + 4 * 5;

7 * k + 35 - 54 = 4 * k + 20;

7 * k - 4 * k = 20 - 35 + 54;

k * (7 - 4) = 20 - 35 + 54;

3 * k = - 15 + 54;

3 * k = 39;

k = 39 / 3;

k = 13 * 3 / 3;

k = 13 / 1;

k = 13;

2) 17 * (c - 2) - 36 = 19 + (c - 2) * 12;

17 * c - 17 * 2 - 36 = 19 + 12 * c - 12 * 2;

17 * c - 34 - 36 = 19 + 12 * c - 24;

17 * c - 70 = 19 + 12 * c - 24;

17 * c - 70 = 12 * c - 5;

17 * c - 12 * c = - 5 + 70;

5 * c = 65;

c = 65 / 5;

c = 13.