3+8=x-9

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Solution for 3+8=x-9 equation: 


Simplifying
3 + 8 = x + -9

Combine like terms: 3 + 8 = 11
11 = x + -9

Reorder the terms:
11 = -9 + x

Solving
11 = -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.
11 + -1x = -9 + x + -1x

Combine like terms: x + -1x = 0
11 + -1x = -9 + 0
11 + -1x = -9

Add '-11' to each side of the equation.
11 + -11 + -1x = -9 + -11

Combine like terms: 11 + -11 = 0
0 + -1x = -9 + -11
-1x = -9 + -11

Combine like terms: -9 + -11 = -20
-1x = -20

Divide each side by '-1'.
x = 20

Simplifying
x = 20

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