Уравнение a) 50y-18y=832 (б) 6z-z+18=43 (в) 2n+7n-12=69

a) 50 * y - 18 * y = 832;

y * (50 - 18) = 832;

y * 32 = 832;

32 * y = 832;

y = 832/32;

y = (8 * 104) / (8 * 4);

y = 104/4;

y = (4 * 26) / 4;

y = 26.

Ответ: y = 26.

б) 6 * z - z + 18 = 43;

z * (6 - 1) + 18 = 43;

z * 5 + 18 = 43;

5 * z + 18 = 43;

5 * z = 43 - 18;

5 * z = 25;

z = 25/5;

z = 5.

Ответ: z = 5.

в) 2 * n + 7 * n - 12 = 69;

n * (2 + 7) - 12 = 69;

n * 9 - 12 = 69;

9 * n - 12 = 69;

9 * n = 69 + 12;

9 * n = 81;

n = 81/9;

n = (9 * 9) / 9;

n = 9.

Ответ: n = 9.