Найдите корень уравнения. 1) 13 х+4 х=408 2) 47 х-15 х=2144 3) а+23 а=1032 4) 16 х-х+14=299 5) 7b+6b-29=374 6) 19y-12y-47=1388

Найдем корни:

1) 13 * х + 4 * х = 408;

x * (13 + 4) = 408;

x * 17 = 408;

17 * x = 408;

x = 408/17;

x = 24;

2) 47 * х - 15 * х = 2144;

32 * x = 2144;

x = 2144/32;

x = 67;

3) а + 23 * а = 1032;

24 * a = 1032;

a = 1032/24;

a = 43;

4) 16 * х - х + 14 = 299;

15 * x + 14 = 299;

15 * x = 299 - 14;

15 * x = 285;

x = 285/15;

x = 19;

5) 7 * b + 6 * b - 29 = 374;

13 * b - 29 = 374;

13 * b = 374 + 29;

13 * b = 403;

b = 403/13;

b = 31;

6) 19 * y - 12 * y - 47 = 1388;

7 * y - 47 = 1388;

7 * y = 1388 + 47;

7 * y = 1435;

y = 1435/7;

y = 205.