1) 15x-12=8-5x 2) - 10y-64=6y 3) 16m-5=15m-10 4) 40-12x=20-11x 5) 63-8n=n 25-9y-5y+11

Найдем корни уравнений:

1) 15 * x - 12 = 8 - 5 * x;

15 * x + 5 * x = 8 + 12;

20 * x = 20;

x = 20/20;

x = 1;

2) - 10 * y - 64 = 6 * y;

-10 * y - 6 * y = 64;

-16 * y = 64;

y = - 64/16;

y = - 8/2;

y = - 4;

3) 16 * m - 5 = 15 * m - 10;

16 * m - 15 * m = - 10 + 5;

m = - 5;

4) 40 - 12 * x = 20 - 11 * x;

-12 * x + 11 * x = 20 - 40;

-x = - 20;

x = 20;

5) 63 - 8 * n = n;

-8 * n - n = - 63;

-9 * n = - 63;

n = - 63 / (-9);

n = 7;

6) 25 - 9 * y - 5 * y = 11;

25 - 14 * y = 11;

-14 * y = 11 - 25;

-14 * y = - 14;

14 * y = 14;

y = 14/14;

y = 1.