(1) 4X + 2 / 5 = 7 / 8 (2) x ／ 5 / 8 = 1 / 12 (3) 44 ／ 4 / 11 × 9 / 11

(1) 4X + 2 / 5 = 7 / 8 (2) x ／ 5 / 8 = 1 / 12 (3) 44 ／ 4 / 11 × 9 / 11

(1) 4X + 2 / 5 = 7 / 8-2 / 5; 4x = 35 / 40-16 / 40; 4x = 19 / 40; X = 19 / 160; 2) x △ 5 / 8 = 1 / 12 x = (5 / 8) × (1 / 12) x = 5 / 96; (3) 44 △ 4 / 11 × 9 / 11 = 44 × (11 / 4) × (9 / 11) = 176 / 9

(x^2+1)-7(x^2+1)+10 (x^2+5x)(x^2+5x-2)-24 （a+1）^2+2(a+1)-8

(x^2+1)-7(x^2+1)+10
=(x²+1-2)(x²+1-5)
=(x²-1)(x²-4)
=(x-1)(x+1)(x-2)(x+2)
(x^2+5x)(x^2+5x-2)-24
=(x²+5x)²-2(x²+5x)-24
=(x²+5x-6)(x²+5x+4)
=(x+6)(x-1)(x+1)(x+4)
（a+1）^2+2(a+1)-8
=(a+1+4)(a+1-2)
=(a+5)(a-1)

4(x+24)=200 2.5x+0.6=1.68-0.5x
The number a is 5.1, which is 1.5 more than three times the number B. find the number B. (write the steps)

4(x+24)=200 2.5x+0.6=1.68-0.5x
4X+96=200 2.5X+0.5X=1.68-0.6
4X=200-96 3X=1.08
X=26 X=0.36
Question 2: let B be X
3X+1.5=5.1
3X=5.1-1.5
X=1.2
So B is 1.2

Four fifths: the simplest integer ratio of eight fifths is (), and the ratio is ()

The simplest integer ratio of 4 / 15: 8 / 21 is (7:10), and the ratio is (0.7)

8 / 15: 12 / 5 simplest integer ratio: () ratio: ()

2: Nine is worth two ninths

25:100 simplest integer ratio and ratio 5:12:15:8 simplest integer ratio and ratio
25:100 simplest integer ratio and ratio: 5:12:15:8 simplest integer ratio and ratio: o.9:o.36 quarter ton ratio: 375 kg

9: What is the ratio of 1 / 15 to the simplest integer?

9: The 1 / 15 ratio is 135, and the simplest integer ratio is 135:1

The ratio of each number: 0.625 to 1, 3 / 8 to 3 / 4, 2 minutes to 12 seconds, 3.5 to 0.63

625 to 1 = 5:8
Three eighths to three fourths = 1:2
2 minutes to 12 seconds = 120:12 = 10:1
3.5 vs 0.63 = 350:63 = 50:9

How to find the ratio
For example, 0.15:0.3 1 / 4:0.4 1 / 2:2 / 3 should be formulated

0.15：0.3
=15：30
=1/2
1/4：0.4
=0.25:0.4
=25:40
=5/8
1/2：2/3
Multiply by 6
=3：4
=3/4

The ratio of 5.25 to 1 and 3 / 4 is [], and the ratio of 17 and 1 / 2 to 8.75 is the simplest integer ratio []

The ratio of 5.25 to 1:3 is [3], and the ratio of 17:1 to 8.75 is the simplest integer ratio [2:1]