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Solution ratio X: 7 / 9 = 14:14-1 / 3 x = 5x / 6 2X of 3 + 2x of 2 = 2 of 3 * 1 of 4
10: 7 / 9 = 14:2 / 5
2x/5=98/9
x=245/9
14-3 / 1 x = 6 / 5 x
5x/6+x/3=14
5x+2x=84
7x=84
x=12
Simplification ratio: 4.5:0.3, 2:7, 47.5:2, 1:0.01, 1:5, 1 hour: 2:5x: 10
The solution equation: (1-25%) x = 4.5. X + 19% x = 170. (3-60%) x = 288
⑴15：1
⑵1：2
⑶3：1
⑷100：1
⑸6：1
⑹10：21
Equation: ① 75% x = 4.5
0.75x=4.5
x=4.5÷0.75
x=6
②（1+19%）x=170
119%x=170
1.19x=170
x=170÷1.19
x≈142.9
③2.4x=288
x=120
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