1)9b+6b-15=615 2)2a+123a+97=472 3)17x-x+5x-19=170 4)73y-y-22y+40=190

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

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

15 * b = 630;

b = 630/15 = 42.

Ответ: b = 42.

2) 2 * a + 123 * a + 97 = 472;

(2 + 123) * a = 472 - 97;

125 * a = 375;

а = 375/125 = 3.

Ответ: а = 3.

3) 17 * x - x + 5 * x - 19 = 170;

(17 - 1 + 5) * x = 170 + 19;

21 * x = 189;

х = 189/21 = 9.

Ответ: х = 9.

4) 73 * y - y - 22 * y + 40 = 190;

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

50 * y = 150;

у = 150/50 = 3.

Ответ: у = 3.