In a formula, the sum of the two external terms is 38, the difference is 22, and the ratio of the two ratios is eight fifths Let's talk about it

In a formula, the sum of the two external terms is 38, the difference is 22, and the ratio of the two ratios is eight fifths Let's talk about it

The sum of the two external terms is 38 and the difference is 22
Two peripherals, one X and one y
X+Y=38
X-Y=22
X=30,Y=8
30/18.75=8/5
12.8/2=8/5
So 30 / 18.75 = 12.8/8
You can write that, too
8/5=8/5
48/30=8/5
So 8:5 = 48:30
Two

Make its internal terms equal, and the ratio of the two ratios is 3 / 4?

9：12=12：16

The two internal terms are equal, and the ratio of the two ratios is 3 / 4

4x3: 3x4 should be, my mother won't, but my thinking is like this