The commercial decimal of 7 divided by 8 is () and the percentage is ()

The commercial decimal of 7 divided by 8 is () and the percentage is ()

The commercial decimal representation of 7 divided by 8 is 0.875
87.5% in percentage

How to calculate fractional power on calculator
How can I press it

For example, 5 ^ (3 / 2), press the key in sequence:
5,x^y,（,3,÷,2,）

How to calculate equation on computer?
There is an equation: 0.36x = x ^ 2-64 x =?
I want to know how to solve equations on the computer
It should be 3.6x = x ^ 2-64 x =?

General scientific calculators can solve any equation as long as you like. When I was in high school, I often used my scientific calculator to solve equations. As long as your calculator supports trigonometric function, exponential function and logarithmic function, basically all finite equations can be solved
I don't know how much you have learned in mathematics. If you have learned advanced mathematics, you can use the tangent method: remember that the equation is f (x) = 0, and the derivative of F (x) is f '(x)
The iterative formula x [K + 1] = x [k] - f (x [k]) / F '(x [k]) is adopted (the bracket denotes the subscript)
Until the value of F (x [K + 1]) satisfies the required accuracy
This method first determines the approximate range of X (generally between two integers, of course, the smaller the range is, the better), and then selects a point as x [0] for iteration (if it is found that f (x [k]) does not approach 0 in the iteration process, then it should change to an initial value or further narrow the range of roots
Let's take an example of transcendental equation
x^2+e^x=9
Let f (x) = x ^ 2 + e ^ X-9, then f '(x) = 2x + e ^ X
It is found that f (- 3) * f (- 2)

X △ 50 = x △ 60 + 2 to solve the equation

x÷50=x÷60+2
x/50=x/60+2
6x=5x+600
6x-5x=600
x=600

X + 26 + x = 50 to solve the equation

X + 26 = 50 how to solve the equation, urgent!

x+26=50
x=50-26
x=24

Please solve the equation: (26-x) * 4 = 50-x!

(26-X)*4=50-X
26*4-4X=50-X
104-50=3X
3X=54
X=18

50 / x = 10 to solve the equation

50 / x = 10, obviously x is not equal to 0
So 50 = 10x
The solution is: x = 5

(X-10) X1 / 2 = 2 / 3x-50 + 10 to solve the equation

(x-10)×1/2=2/3x-50+10
(1/2)x-5=(2/3)x-40
(2/3)x-(1/2)x=40-5
(1/6)x=35
x=35÷(1/6)
x=210

Solve the equation x / 50 * 30 + 10 (x / 30 + X / 50) = x

3/5x+8/15x=x
x=0