20=x+(x+1)+(x+2)

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Solution for 20=x+(x+1)+(x+2) equation:


Simplifying
20 = x + (x + 1) + (x + 2)

Reorder the terms:
20 = x + (1 + x) + (x + 2)

Remove parenthesis around (1 + x)
20 = x + 1 + x + (x + 2)

Reorder the terms:
20 = x + 1 + x + (2 + x)

Remove parenthesis around (2 + x)
20 = x + 1 + x + 2 + x

Reorder the terms:
20 = 1 + 2 + x + x + x

Combine like terms: 1 + 2 = 3
20 = 3 + x + x + x

Combine like terms: x + x = 2x
20 = 3 + 2x + x

Combine like terms: 2x + x = 3x
20 = 3 + 3x

Solving
20 = 3 + 3x

Solving for variable 'x'.

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

Add '-3x' to each side of the equation.
20 + -3x = 3 + 3x + -3x

Combine like terms: 3x + -3x = 0
20 + -3x = 3 + 0
20 + -3x = 3

Add '-20' to each side of the equation.
20 + -20 + -3x = 3 + -20

Combine like terms: 20 + -20 = 0
0 + -3x = 3 + -20
-3x = 3 + -20

Combine like terms: 3 + -20 = -17
-3x = -17

Divide each side by '-3'.
x = 5.666666667

Simplifying
x = 5.666666667

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