4x+12+7x-21=

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Solution for 4x+12+7x-21= equation:


Simplifying
4x + 12 + 7x + -21 = 0

Reorder the terms:
12 + -21 + 4x + 7x = 0

Combine like terms: 12 + -21 = -9
-9 + 4x + 7x = 0

Combine like terms: 4x + 7x = 11x
-9 + 11x = 0

Solving
-9 + 11x = 0

Solving for variable 'x'.

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

Add '9' to each side of the equation.
-9 + 9 + 11x = 0 + 9

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

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

Divide each side by '11'.
x = 0.8181818182

Simplifying
x = 0.8181818182

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