x+(x+9)(-9)=x-9

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Solution for x+(x+9)(-9)=x-9 equation:


Simplifying
x + (x + 9)(-9) = x + -9

Reorder the terms:
x + (9 + x)(-9) = x + -9

Reorder the terms for easier multiplication:
x + -9(9 + x) = x + -9
x + (9 * -9 + x * -9) = x + -9
x + (-81 + -9x) = x + -9

Reorder the terms:
-81 + x + -9x = x + -9

Combine like terms: x + -9x = -8x
-81 + -8x = x + -9

Reorder the terms:
-81 + -8x = -9 + x

Solving
-81 + -8x = -9 + x

Solving for variable 'x'.

Move all terms containing x to the left, all other terms to the right.

Add '-1x' to each side of the equation.
-81 + -8x + -1x = -9 + x + -1x

Combine like terms: -8x + -1x = -9x
-81 + -9x = -9 + x + -1x

Combine like terms: x + -1x = 0
-81 + -9x = -9 + 0
-81 + -9x = -9

Add '81' to each side of the equation.
-81 + 81 + -9x = -9 + 81

Combine like terms: -81 + 81 = 0
0 + -9x = -9 + 81
-9x = -9 + 81

Combine like terms: -9 + 81 = 72
-9x = 72

Divide each side by '-9'.
x = -8

Simplifying
x = -8

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