1) 70*x-50=580 2 4 92) X-15 = 15 + 153) 1500: (Y-189) = 25 9 4 114) Y+15 = 15 + 155) 460-C:105=180 15 9 66) 15-C = 19-19

Найдем корень уравнения.

1) 70 * x - 50 = 580;

70 * x = 580 + 50;

70 * x = 630;

x = 630/70;

x = 63/7;

x = 9.

2) X - 15 = 15 + 15;

x - 15 = 30;

x = 30 + 15;

x = 45.

3) 1 500 / (Y - 189) = 25;

25 * (y - 189) = 1 500;

y - 189 = 1500/25;

y - 189 = 60;

y = 60 + 189;

y = 249.

4) Y + 15 = 15 + 15;

y + 15 = 30;

y = 30 - 15;

y = 15.

5) 460 - C/105 = 180;

-c/105 = 180 - 460;

-c/105 = - 280;

c/105 = 280;

c = 280 * 105;

c = 29 400.

6) 15 - C = 19 - 19;

15 - c = 0;

-c = - 15;

c = 15.