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