42+12x=49+21x+9

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Solution for 42+12x=49+21x+9 equation:


Simplifying
42 + 12x = 49 + 21x + 9

Reorder the terms:
42 + 12x = 49 + 9 + 21x

Combine like terms: 49 + 9 = 58
42 + 12x = 58 + 21x

Solving
42 + 12x = 58 + 21x

Solving for variable 'x'.

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

Add '-21x' to each side of the equation.
42 + 12x + -21x = 58 + 21x + -21x

Combine like terms: 12x + -21x = -9x
42 + -9x = 58 + 21x + -21x

Combine like terms: 21x + -21x = 0
42 + -9x = 58 + 0
42 + -9x = 58

Add '-42' to each side of the equation.
42 + -42 + -9x = 58 + -42

Combine like terms: 42 + -42 = 0
0 + -9x = 58 + -42
-9x = 58 + -42

Combine like terms: 58 + -42 = 16
-9x = 16

Divide each side by '-9'.
x = -1.777777778

Simplifying
x = -1.777777778

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