Х+х-9-х+14=86

To solve for x in the equation \( x + x - 9 - x + 14 = 86 \), we need to combine like terms and then solve for x.

Combining like terms (the terms with x):

\( x + x - x = 1x \) (since \( 1x + 1x - 1x = 1x \))

Now our equation becomes:

\( 1x - 9 + 14 = 86 \)

Combine the constant terms:

\( -9 + 14 = 5 \)

Now the equation is:

\( x + 5 = 86 \)

To solve for x, we subtract 5 from both sides of the equation:

\( x = 86 - 5 \)

\( x = 81 \)

Therefore, the value of x that satisfies the equation is 81.