12+9=8x+1+4x

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Solution for 12+9=8x+1+4x equation:


Simplifying
12 + 9 = 8x + 1 + 4x

Combine like terms: 12 + 9 = 21
21 = 8x + 1 + 4x

Reorder the terms:
21 = 1 + 8x + 4x

Combine like terms: 8x + 4x = 12x
21 = 1 + 12x

Solving
21 = 1 + 12x

Solving for variable 'x'.

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

Add '-12x' to each side of the equation.
21 + -12x = 1 + 12x + -12x

Combine like terms: 12x + -12x = 0
21 + -12x = 1 + 0
21 + -12x = 1

Add '-21' to each side of the equation.
21 + -21 + -12x = 1 + -21

Combine like terms: 21 + -21 = 0
0 + -12x = 1 + -21
-12x = 1 + -21

Combine like terms: 1 + -21 = -20
-12x = -20

Divide each side by '-12'.
x = 1.666666667

Simplifying
x = 1.666666667

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