Решите пропорцыю х:7=5:8 x:3=4:5 2:x=3:4 1:x=7:8
Х : 7 = 5 : 8 х : 3 = 4 : 5 2 : х = 3 : 4 1 : х = 7 : 8 8х = 7 * 5 5х = 3 * 4 3х = 2 * 4 7х = 1 * 8 8х = 35 5х = 12 3х = 8 7х = 8 х = 35/8 х = 12/5 х = 8/3 х = 8/7 х = 4 3/8 х = 2 2/5 х = 2 2/3 х = 1 1/7