please tell me how x=2x+4 leads to x=-4?

x = 2x + 4
x - 2x = 4
-x = 4
x = 4/-1
x = -4

x - 4 = 2x
- 4 = x
x = - 4

x = 2x + 4 // Subtract x + 4 from both sides and flip the equation around the "equals" sign.
x = −4

x = 2x + 4
x - 2x = 4
- x = 4
Now you can exchange signs.
x = - 4

or

x = 2x + 4
- 4 = 2x - x
- 4 = x

the priority is impossible with 4 diverse digits. this is the information: permit a b c d be the digits of the huge sort 10³a+10²b+10c+d. all of us be responsive to that a is helpful and under 10 and b,c,d are nonnegative and under 10. The given situations yield here b= ½a, so a = 2b d+2 = a+ b a+b+c+d = 15. considering the fact that a = 2b, d + 2 = 3b so d = 3b -2. The final equation now yields 2b+b+c+3b-2 = 15. 6b+c = 17. be conscious that b can not equivalent 0 or a million, considering the fact that that could make c better than 10. additionally if b > 2 then c could be detrimental. So b = 2 and c = 5. This finally supplies us a = 4 and d = 4. So the only huge sort pleasing all of the situations is 4254, which does not have distinctive digits.

x=2x+4
x-2x=4
-x=4
since variables cant be negative
x=-4

x=2x+4
x-4=2x+4-4
x-4=2x
x-x-4=2x--x
-4=x

x = 2x + 4

Group like terms on each side of the equals sign by subtracting 2x from both sides.

x - 2x = 2x + 4 - 2x

x (read "x" or "1x") - 2x = -1x = -x

2x + 4 - 2x = 4

-x = 4

Since x has to be expressed as a positive value, remove the negative sign from x and add the sign to 4.

x = -4

So this

lets see... im learning algebra in 6th grade math this year. hmm... youre right, it would be -4 because if it's -4=2 x -4 +4 you need to remember pemdas order of operations (parentheses equations multiplication division addition subtraction) 2 times -4 is -8 plus positive 4 is -4 because 8 is bigger than 4 and 4 is a positive so you would take the sign of a 8 which is negative...

HOPE I HELPED!!

x = 2x + 4
-2x -2x
-x = 4
x = -4