Is 21 out of 56 greater than 24 out of 40?

Is 21 out of 56 greater than 24 out of 40?

Because 21 out of 56 = 3 out of 8
24 out of 40 = 3 out of 5
3 out of 8 is less than 3 out of 5
So 21 out of 56 is less than 24 out of 40

How to calculate (102 × 104 × 106 × 108) / (51 × 52 × 53 × 54)

=(102÷51)×(104÷52)×(106÷53)×(108÷54)
=2×2×2×2
=16

（1/2—1/4+1/6—1/8+1/10+…… +1/198—1/200）/1/51+1/52+…… 1/100=?

1/2-1/4+1/6-1/8+1/10-1/12+… +1/198-1/200 =(1-1/2+1/3-1/4+ ...+1/99-1/100)/2 =[(1+1/2+ ...+1/99+1/100)-2(1/2+1/4+ ...+1/98+1/100)]/2 =[(1+1/2+ ...+1/99+1/100)-(1+1/2+ ...+1/49+1/50)]/2 =(1/51+1/52+1/53...

Solving equation 10x ^ 9 - 9x ^ 10 - 0.75 = 0

There is no way to solve this problem
But the approximate result can be obtained by graphic calculator or computer as x = 0.9035961474, or x = 1.063042214

10X+4=9X+10
Be in a hurry

10X+4=9X+10
10X-9X=10-4
X=6

23-1.7x = 13.4

You wait

Solve equation 7x + 13 = 98.4

7x=98.4-13
7x=85.4
x=12.2

Solution equation: 1 / (x-3) = 2 + (x) / 3-x
With both sides of the same ride

Multiply both sides (x-3)
1=2(x-3)-x
1=x-6
x=7
Substituting into the equation, 1 / 4 = 2-7 / 4
Verification is correct

Ask a solution to the equation: 3 (X-5) = 10.5

3（X-5）=10.5
X-5=10.5÷3
X-5=3.5
X=3.5+5
X=8.5

Solve the equation | x + 3 | + | X-5 | = 10

A:
|x+3|+|x-5|=10
The sum of the distances from point x to point - 3 and point 5 on the number axis is 10
Because: 5 - (- 3) = 8