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

5/14х=4/21+12-7,5 5/14х=4/21+4,5 5/14х=4/21+45/10 5/14х=40/210+945/210 5/14х=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