What is 20x-4=200
what is x?

x = 10.2

Step-by-step explanation:

To solve for x, we have to isolate it on one side of the = sign. The number on the other side is the value of x.

20x - 4 = 200

First, we can remove -4 from the equation. The inverse of -4 is +4, so we will add 4 to both sides. Adding 4 to -4 will neutralize it, making its value 0.

20x - 4 + 4 = 200 +4

Simplify this.

20x = 204

Now, we have 20 · x = 204. The inverse of multiplication is division. To the times 20, we will divide by 20 as well.

=

Simplify.

x = 10.2

We can check this by substituting the value of x, 10.2, for the variable.

20(10.2) - 4 = 200

204 - 4 = 200

200 = 200

Since the equation is true, the answer must be 10.2.

I hope this helps ^^ Good luck

Let the original number be ‘x’
Then half of that number= 1/2x or simply x/2
Similarly one fifth of that number = x/5
According to the question
x+x/2+x/5=51
Taking LCM
10x/10+2x/10+5x/10=51
Multiplying 10 throughout
10x+2x+5x=510
17x=510
x=510/17
Therefore x=30