Решите уравнение 23.5 - (2.3 а + 1.2 а) = 19.3 12.98 - (3.8 х-1.3 х) = 11.23

Вычислим корни:

1) 23.5 - (2.3 * а + 1.2 * а) = 19.3;

23.5 - 2.3 * a - 1.2 * a = 19.3;

-2.3 * a - 1.2 * a = 19.3 - 23.5;

-2.3 * a - 1.2 * a = - 10 + 6 - 0.2;

a * (-2.3 - 1.2) = - 4.2;

-3.5 * a = - 4.2;

Умножим на - 10.

35 * a = 42;

а = 42/35;

а = 6 * 7 / (7 * 5);

а = 6/5.

2) 12.98 - (3.8 * х - 1.3 * х) = 11.23;

- (3.8 * x - 1.3 * x) = 11.23 - 12.98;

x * (-3.8 + 1.3) = - 1 - 0.7 - 0.05;

x * (-2.5) = - 1 - 0.75;

-2.5 * x = - 1.75;

2.5 * x = 1.75;

x = 1.75/2.5;

x = 0.7.