The second property: A:B=C:D, if n >;; 0, then there is nA:nB=nC:nD.
1 " a:b = 1/2: 1/3 & gt; & gt& gt 1/2 * b = 1/3 * a & gt; & gt& gt2a=3b, that is, a: b = 3: 2 and a = 3/2b.
B:c=0.3:0.2=3:2, that is, c=2/3b, so
a:b:c = 3/2b:b:2/3b = 3/2: 1:2/3
Multiply it by 6:a:b:c = 9:6:4.
2 "Assuming that the latter term plus X can keep the ratio unchanged, you can get 2.5: 5.25 = (2.5+1.5): (5.25+x).
According to property one, we can get 5.25*4=2.5*(5.25+X).
The result of Jie's solution is x = 5.25 *1.5/2.5 = 3.15.
3:X:36=2:9 >& gt& gt& gtx=36*2/9=8
Successful speech 1
Dear students:
Hello everyone!
Ducal said, "I think, therefore I am." If you are alive, you must show your existence and