Упростите пожалуйста
1/6х + 2/9х - 0,25 * 5/9х = 1/6х + 2/9х - 25/100 * 5/9х = 1/6х + 2/9х - 1/4 * 5/9х = 1/6х + 2/9х - 5/36х = 6/36х + 8/36х - 5/36х = 9/36х = 1/4х