4x+2x+1=2x-x+21

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Solution for 4x+2x+1=2x-x+21 equation:


Simplifying
4x + 2x + 1 = 2x + -1x + 21

Reorder the terms:
1 + 4x + 2x = 2x + -1x + 21

Combine like terms: 4x + 2x = 6x
1 + 6x = 2x + -1x + 21

Reorder the terms:
1 + 6x = 21 + 2x + -1x

Combine like terms: 2x + -1x = 1x
1 + 6x = 21 + 1x

Solving
1 + 6x = 21 + 1x

Solving for variable 'x'.

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

Add '-1x' to each side of the equation.
1 + 6x + -1x = 21 + 1x + -1x

Combine like terms: 6x + -1x = 5x
1 + 5x = 21 + 1x + -1x

Combine like terms: 1x + -1x = 0
1 + 5x = 21 + 0
1 + 5x = 21

Add '-1' to each side of the equation.
1 + -1 + 5x = 21 + -1

Combine like terms: 1 + -1 = 0
0 + 5x = 21 + -1
5x = 21 + -1

Combine like terms: 21 + -1 = 20
5x = 20

Divide each side by '5'.
x = 4

Simplifying
x = 4

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