Решите уравнение: 5/14x - 12 = 4/21 - 7.5!

5/14 х=4/21+12-7,5

5/14 х=4/21+4,5

5/14 х=4/21+45/10

5/14 х=40/210+945/210

5/14 х=985/210

х=985/210*14/5

х=197/15

х=13 2/15

проверка

5/14*197/15-12=4/21-7,5

197/42-12=4/21-75/10

197/42-504/42=40/210-1575/210

-307/42=-1535/210

-307/42=-307/42