Решите уравнение 1) 9 в+6 в-15=615 2) 2 а+123 а+97=472 3) 17 х-х+5 х-19=170 4) 73 у-у-22 у+40=190

Вычислим корни:

1) 9 * b + 6 * b - 15 = 615;

9 * b + 6 * b = 615 + 15;

b * (9 + 6) = 630;

b * 15 = 630;

15 * b = 630;

5 * 3 * b = 210 * 3;

5 * b = 210;

b = 210/5;

b = 40 + 2;

b = 42.

2) 2 * а + 123 * а + 97 = 472;

125 * a + 97 = 472;

125 * a = 472 - 97;

125 * a = 375;

a = 375/125;

a = 3.

3) 17 * х - х + 5 * х - 19 = 170;

16 * x + 5 * x - 19 = 170;

21 * x - 19 = 170;

21 * x = 170 + 19;

21 * x = 189;

x = 189/21;

x = 63/7;

x = 9.

4) 73 * у - у - 22 * у + 40 = 190;

y * (73 - 1 - 22) = 190 - 40;

y * (72 - 22) = 150;

50 * y = 150;

y = 3.