12+4=x-9

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Solution for 12+4=x-9 equation:


Simplifying
12 + 4 = x + -9

Combine like terms: 12 + 4 = 16
16 = x + -9

Reorder the terms:
16 = -9 + x

Solving
16 = -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.
16 + -1x = -9 + x + -1x

Combine like terms: x + -1x = 0
16 + -1x = -9 + 0
16 + -1x = -9

Add '-16' to each side of the equation.
16 + -16 + -1x = -9 + -16

Combine like terms: 16 + -16 = 0
0 + -1x = -9 + -16
-1x = -9 + -16

Combine like terms: -9 + -16 = -25
-1x = -25

Divide each side by '-1'.
x = 25

Simplifying
x = 25

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