x+x+x+2x-9=51

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Solution for x+x+x+2x-9=51 equation:


Simplifying
x + x + x + 2x + -9 = 51

Reorder the terms:
-9 + x + x + x + 2x = 51

Combine like terms: x + x = 2x
-9 + 2x + x + 2x = 51

Combine like terms: 2x + x = 3x
-9 + 3x + 2x = 51

Combine like terms: 3x + 2x = 5x
-9 + 5x = 51

Solving
-9 + 5x = 51

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 + 5x = 51 + 9

Combine like terms: -9 + 9 = 0
0 + 5x = 51 + 9
5x = 51 + 9

Combine like terms: 51 + 9 = 60
5x = 60

Divide each side by '5'.
x = 12

Simplifying
x = 12

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