3.6 times of a number is 7.2 more than 2.4 times of this number. Find this number. (use equation solution)

3.6 times of a number is 7.2 more than 2.4 times of this number. Find this number. (use equation solution)

This number is X
3.6x-2.4x=7.2
x=6

How to solve this equation? The square of 16 + X + the square of (8-x) + 16 = 64

The original equation is sorted out as X Λ 2 + 8x + 136 = 0, and the discriminant △ = 8 Λ 2-4 * 136

The solution of equation 64 / 4x = 16 is () a.x = 2 b.x = 1 c.x = 4

64/4x=16
4x=64/16
4x=4
x=1
Choose B

How to solve the simultaneous equations of (x - 4) ^ 2 + y ^ 2 = 16 and (x + 2) ^ 2 + (Y - 2) ^ 2 = 8,

(x-4)^2+y^2=16①
(x+2)^2+(y-2)^2=8②
Expand the above two formulas
Then, it is simplified by ① - ②
-3x+y=0③
Substitute (3) for (1)
x^2-8x+16+9x^2-16=0
10x^2-8x=0
The solution of this equation is as follows
X = 0 or 4 / 5

The solution of equation 4 / [[x + 1] 2-4] - 8 / [[x + 1] 2-16] - 2 / [[x + 2] 2-1] + 2 / [[X-2] 2-1] - 6 / [[X-2] 2-9] = 4 / 5 is X=

4/[[x+1]2-4]=4/(x-1)(x+3)=[(x+3)-(x-1)]/(x-1)(x+3)
=(x+3)/(x-1)(x+3)-(x-1)/(x-1)(x+3)
=1/(x-1)-1/(x+3)
8/[[x+1]2-16]=8/(x-3)(x+5)=[(x+5)-(x-3)]/(x-3)(x+5)
=(x+5)/(x-3)(x+5)-(x-3)/(x-3)(x+5)
=1/(x-3)-1/(x+5)
2/[[x+2]2-1]=2/(x+1)(x+3)=[(x+3)-(x+1)]/(x+1)(x+3)
=(x+3)/(x+1)(x+3)-(x+1)/(x+1)(x+3)
=1/(x+1)-1/(x+3)
2/[[x-2]2-1]=2/(x-3)(x-1)=[(x-1)-(x-3)]/(x-3)(x-1)
=(x-1)/(x-3)(x-1)-(x-3)/(x-3)(x-1)
=1/(x-3)-1/(x-1)
6/[[x-2]2-9]=6/(x-5)(x+1)=[(x+1)-(x-5)]/(x-5)(x+1)
=(x+1)/(x-5)(x+1)-(x-5)/(x-5)(x+1)
=1/(x-5)-1/(x+1)
Equation left = [1 / (x-1) - 1 / (x + 3)] - [1 / (x-3) - 1 / (x + 5)]
-[1/(x+1)-1/(x+3)]+[1/(x-3)-1/(x-1)]-[1/(x-5)-1/(x+1)]
=1/(x-1)-1/(x+3)-1/(x-3)+1/(x+5)-1/(x+1)+1/(x+3)
+1/(x-3)-1/(x-1)-1/(x-5)+1/(x+1)
=[1/(x-1)-1/(x-1)]+[1/(x+3)-1/(x+3)]+[1/(x-3)-1/(x-3)]
+[1/(x+1)-1/(x+1)]+1/(x+5)-1/(x-5)
=1/(x+5)-1/(x-5)
=[(x-5)-(x+5)]/(x+5)(x-5)
=-10/(x^2-25)
The equation is - 10 / (x ^ 2-25) = 4 / 5
-12.5=x^2-25
x^2=12.5
x=±(5√2)/2

If the solution of equation 16 + a = 4x-7 is x = 8, what is the value of a? If the solution of equation 16 + a = 4x-7 is x = 10?

X=(23+A)/4 23+A=32 A=9
In the same way, we can ask the next question

How to solve the equation x-0.8-6 = 16?
kaunkuai

x-0.8-6=16
x=16+6+0.8
x=22.8

6-4x 12.2ᆖ16.

6-4x=16.6-12.2
4x =4.4+6
4x=10.4
x=10.4/4
x=2.6

How to solve the equation 4x + 12.4-16.4 = 4?

4x+12.4-16.4=4
4x-4=4
4x=8
x=2

(12) The solution of equation 5.2 + 0.4x = 7.8

5.2+0.4X=7.8
0.4x=2.6
x=6.5