Решите уравнения 1) 3x+14=35 2) 1/2x+9=17 3) 8+2/3y=14 4) 27=6y+39 5) 1.5x-3=2 6) 5-0.2z=1 7) 31-2z=15 8) 3+0.1x=4 9) 1.2t+0.4=1

1) 3x + 14 = 35;

3x = 35 - 14;

3x = 21;

x = 21 : 3;

x = 7.

2) 1/2x + 9 = 17;

1/2x = 17 - 9;

1/2x = 8;

x = 8 * 2;

x = 16.

3) 8 + 2/3y = 14;

2/3y = 14 - 8;

2/3y = 6;

y = 6 * 3/2;

y = 18/2;

y = 9.

4) 27 = 6y + 39;

27 - 39 = 6y;

-12 = 6y;

6y = - 12;

y = - 12 : 6;

y = - 2.

5) 1,5x - 3 = 2;

1,5x = 2 + 3;

1,5x = 5;

x = 5 : 1,5;

x = 3,33.

6) 5 - 0,2z = 1;

-0,2z = 1 - 5;

-0,2z = - 4;

z = - 4 : (-0,2);

z = 20.

7) 31 - 2z = 15;

-2z = 15 - 31;

-2z = - 16;

z = - 16 : (-2);

z = 8.

8) 3 + 0,1x = 4;

0,1x = 4 - 3;

0,1x = 1;

x = 1 : 0,1;

x = 10.

9) 1,2t + 0,4 = 1;

1,2t = 1 - 0,4;

1,2t = 0,6;

t = 0,6 : 1,2;

t = 0,5.