3,5× (x+2целых 1,4)= 14
3,5 * (х + 2 1/4 ) = 14 2ц.1/4 = 2,25 3,5х + 3,5 * 2,25 = 14 3,5х + 7,875 = 14 3,5 х = 14 - 7,875 3,5х = 6,125 х = 1,75