2X+4X=21-X

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Solution for 2X+4X=21-X equation:


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

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

Solving
6X = 21 + -1X

Solving for variable 'X'.

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

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

Combine like terms: 6X + X = 7X
7X = 21 + -1X + X

Combine like terms: -1X + X = 0
7X = 21 + 0
7X = 21

Divide each side by '7'.
X = 3

Simplifying
X = 3

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