21x+4=7x

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Solution for 21x+4=7x equation:


Simplifying
21x + 4 = 7x

Reorder the terms:
4 + 21x = 7x

Solving
4 + 21x = 7x

Solving for variable 'x'.

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

Add '-7x' to each side of the equation.
4 + 21x + -7x = 7x + -7x

Combine like terms: 21x + -7x = 14x
4 + 14x = 7x + -7x

Combine like terms: 7x + -7x = 0
4 + 14x = 0

Add '-4' to each side of the equation.
4 + -4 + 14x = 0 + -4

Combine like terms: 4 + -4 = 0
0 + 14x = 0 + -4
14x = 0 + -4

Combine like terms: 0 + -4 = -4
14x = -4

Divide each side by '14'.
x = -0.2857142857

Simplifying
x = -0.2857142857

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