Решительно уравнение 4х-15(2+3х)=7-24х. х-1+1/5х=1. 9х+4(7y-1)=32-8у. 3-х=5,4+0,2

Вычислим корешки.

1)  4 * х 15 * (2 + 3 * х) = 7 24 * х;

Раскроем скобки.

4 * x 15 * 2 15 * 3 * x = 7 24 * x;

4 * x 30 45 * x = 7 24 * x;

-41 * x 30 = 7 24 * x;

-41 * x + 24 * x = 7 + 30;

-17 * x = 37;

x = -37/17.  

2) * х 1 + 1/5 * х = 1 ;

* x + 1/5 * x = 1 2/3 + 1 ;

* x + 3/2  * x = 5/3 + 3/2;

3 * 3 * x + 3 * 6 * x = 5 * 4 + 3 * 6;

9 * x + 18 * x = 20 + 18;

27 * x = 38;

x = 38/27.

3)  9 * y + 4 * (7 * y - 1) = 32 8 * у;

9 * y + 28 * y 4 = 32 8 * y;

37 * y 4 = 32 8 * y;

37 * y + 8 * y = 32 + 4;

45 * y = 36;

y = 36/45;

y = 4/5;

y = 0.4.

4) 3 - * х = 5,4 + 0,2;

10/3 2/3 * x = 5.6;

10/3 2/3 * x = 5 3/5;

10/3 2/3 * x = 28/5;

10 * 5 2 * x * 5 = 28 * 3;

50 10 * x = 78;

-10 * x = 78 50;

-10 * x = 28;

x = -28/10;

x = -2.8.