Решите уравнение (5/16+х)-1/6=7/12; (4/5-x)+13/20=25/30

(5/16 + х) - 1/6 = 7/12;

5/16 + х = 7/12 + 1/6;

5/16 + х = 7/12 + (1 * 2)/(6 * 2);

5/16 + х = 7/12 + 2/12;

5/16 + х = 9/12;

5/16 + х = (3 * 3)/(4 * 3);

5/16 + х = 3/4;

х = 3/4 - 5/16;

х = (3 * 4)/(4 * 4) - 5/16;

х = 12/16 - 5/16;

х = 7/16.

2) (4/5 - х) + 13/20 = 25/30;

(4/5 - х) = 25/30 - 13/20;

4/5 - х = (25 * 2)/(30 * 2) - (13 * 3)/(20 * 3);

4/5 - х = 50/60 - 39/60;

4/5 - х = (50 - 39)/60;

4/5 - х = 11/60;

4/5 - 11/60 = х;

х = (4 * 12)/(5 * 12) - 11/60;

х = 48/60 - 11/60;

х = (48 - 11)/60;

х = 37/60.