18=3y+3 6x+10=5x+15 -5n-16=3n 8-5n=10-4n 9m-8=6m+7 56-9n=-5n 15-8x=2-9x -6m+32=2m 10z+7=9z+5 10-9y=70-6y

1) 18 = 3 * y + 3;

18 -  3 = 3 * y;

6 - 1 = у;

у = 5.

2) 6 * x + 10 = 5 * x + 15;

6 * x - 5 * x = 15 - 10;

х = 5.

3) - 5 * n - 16 = 3 * n;

- 5 * n - 3 * n = 16;

- 8 * n = 16;

n = 16/( - 8);

n = - 2.

4) 8 - 5 * n = 10 - 4 * n;

4 * n - 5 * n = 10 - 8;

- n = 2;

n = - 2.

5) 9 * m - 8 = 6 * m + 7;

9 * m - 6 * m = 7 + 8;

3 * m = 15;

m = 15/3;

m = 5.

6) 56 - 9 * n = - 5 * n;

5 * n - 9 * n = - 56;

- 4 * n = - 56;

n = 56/4;

n = 14.

7) 15 - 8 * x = 2 - 9 * x;

9 * x - 8 * x = 2 - 15;

х = - 13.

8) - 6 * m + 32 = 2 * m;

- 6 * m - 2 * m = - 32;

- 8 * m = - 32;

m = - 32/( - 8);

m = 4.

9) 10 * z + 7 = 9 * z + 5;

10 * z - 9 * z = 5 - 7;

z = - 2.

10) 10 - 9 * y = 70 - 6 * y;

6 * y - 9 * y = 70 - 10;

- 3 * y = 60;

y = - 60/3;

y = - 20.