x+(x-3)+(x-6)=30

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Solution for x+(x-3)+(x-6)=30 equation:


Simplifying
x + (x + -3) + (x + -6) = 30

Reorder the terms:
x + (-3 + x) + (x + -6) = 30

Remove parenthesis around (-3 + x)
x + -3 + x + (x + -6) = 30

Reorder the terms:
x + -3 + x + (-6 + x) = 30

Remove parenthesis around (-6 + x)
x + -3 + x + -6 + x = 30

Reorder the terms:
-3 + -6 + x + x + x = 30

Combine like terms: -3 + -6 = -9
-9 + x + x + x = 30

Combine like terms: x + x = 2x
-9 + 2x + x = 30

Combine like terms: 2x + x = 3x
-9 + 3x = 30

Solving
-9 + 3x = 30

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 + 3x = 30 + 9

Combine like terms: -9 + 9 = 0
0 + 3x = 30 + 9
3x = 30 + 9

Combine like terms: 30 + 9 = 39
3x = 39

Divide each side by '3'.
x = 13

Simplifying
x = 13

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