x+(x+10)+x+20=57

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Solution for x+(x+10)+x+20=57 equation:


Simplifying
x + (x + 10) + x + 20 = 57

Reorder the terms:
x + (10 + x) + x + 20 = 57

Remove parenthesis around (10 + x)
x + 10 + x + x + 20 = 57

Reorder the terms:
10 + 20 + x + x + x = 57

Combine like terms: 10 + 20 = 30
30 + x + x + x = 57

Combine like terms: x + x = 2x
30 + 2x + x = 57

Combine like terms: 2x + x = 3x
30 + 3x = 57

Solving
30 + 3x = 57

Solving for variable 'x'.

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

Add '-30' to each side of the equation.
30 + -30 + 3x = 57 + -30

Combine like terms: 30 + -30 = 0
0 + 3x = 57 + -30
3x = 57 + -30

Combine like terms: 57 + -30 = 27
3x = 27

Divide each side by '3'.
x = 9

Simplifying
x = 9

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