2:0.6=10:(X-2) 0.7:X=12:24 X:705=21:18 5X:3=10.9

问题描述:

2:0.6=10:(X-2) 0.7:X=12:24 X:705=21:18 5X:3=10.9

6.54

2:0.6=10:(X-2)解得X=5;
0.7:X=12:24 解得X=1.4;
X:705=21:18 解得X=822.5;
5X:3=10.9 解得X=6.54