Решите пропорции . 1) 13/15=x/10. 2) 48/51=x/34.3)8/7=15/x.4)8/1=3/x
1) 15х = 130 х = 130 : 15 х = 8 10/15 х = 8 2/3 2) 51х = 48* 34 51х = 1632 х = 32 3) 8х = 7 * 15 8х = 105 х = 13 1/8 4) 8х = 3 х = 3/8