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Q: Why is x plus x equal to 2x?

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x+x=2x

It doesn't; it equals 2x. Only if x = 0 does 2x = x.

no...why would it.... it equals 2x+9

2x + 7 + 5x - 4 - x = (2x + 5x - x) + (7 - 4) = 6x + 3

2x + x + 2x + x = 6x

It equals x+5y simplified

x+3(x+1)=2x x + 3x + 3 = 2x 2x + 3 = 0 2x = -3 or x = -1.5

4x - 2x = x + 10 2x = x + 10 2x - x = 10 x = 10 Thanks

2x + 3 = 9 2x = 6 x = 3

6 + 2x =2(3 + x)

There is insufficient information to answer this question. If you mean, what does x equal for: 9 + 6x = 2x ...then the answer is: 9 = 2x - 6x = -4x ...which is equal to: x = -9/4 If you mean, what does x equal for: 9 + 6x + 2x = 0 ...then the answer is: 8x = -9 ...which is equal to: x = -9/8

-8x

X 3 plus x-142 plus x is an equation equal to x3+2x-142.

If 4x - 2x + 4 = 10, the solution is 2x + 4 = 10 and x = 3.

It can be (for x = -2.5) but not for any other value of x.

You can do the equation Y 2x plus 3 on a graph. On this graph the Y would equal 5 and X would equal to 0.

X + ( 2Y - 2X - Y ) is equal to Y - X

7x = 4x+2x+1xSo 7x/2 = 4x/2 + 2x/2 + x/2 (by the distributive property of division over addition) = 2x + x + x/2

Collecting like terms they are equal to: 2x+6y

4x+9=2x-6 2x=-15 x=-7.5 x equals -7.5.

X can't be solved, you don't have anything on the right side of the equal.

3

2X+6

4

There is always a 1 in front of the x but the 1 is invisible so it same as 1x + 1x = 2x x + x = 2x