x+x+x+2+x+2+1=21

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Solution for x+x+x+2+x+2+1=21 equation: 


Simplifying
x + x + x + 2 + x + 2 + 1 = 21

Reorder the terms:
2 + 2 + 1 + x + x + x + x = 21

Combine like terms: 2 + 2 = 4
4 + 1 + x + x + x + x = 21

Combine like terms: 4 + 1 = 5
5 + x + x + x + x = 21

Combine like terms: x + x = 2x
5 + 2x + x + x = 21

Combine like terms: 2x + x = 3x
5 + 3x + x = 21

Combine like terms: 3x + x = 4x
5 + 4x = 21

Solving
5 + 4x = 21

Solving for variable 'x'.

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

Add '-5' to each side of the equation.
5 + -5 + 4x = 21 + -5

Combine like terms: 5 + -5 = 0
0 + 4x = 21 + -5
4x = 21 + -5

Combine like terms: 21 + -5 = 16
4x = 16

Divide each side by '4'.
x = 4

Simplifying
x = 4

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