x+x+x+2=21

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Solution for x+x+x+2=21 equation: 


Simplifying
x + x + x + 2 = 21

Reorder the terms:
2 + x + x + x = 21

Combine like terms: x + x = 2x
2 + 2x + x = 21

Combine like terms: 2x + x = 3x
2 + 3x = 21

Solving
2 + 3x = 21

Solving for variable 'x'.

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

Add '-2' to each side of the equation.
2 + -2 + 3x = 21 + -2

Combine like terms: 2 + -2 = 0
0 + 3x = 21 + -2
3x = 21 + -2

Combine like terms: 21 + -2 = 19
3x = 19

Divide each side by '3'.
x = 6.333333333

Simplifying
x = 6.333333333

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