7x=3x-21

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Solution for 7x=3x-21 equation: 


Simplifying
7x = 3x + -21

Reorder the terms:
7x = -21 + 3x

Solving
7x = -21 + 3x

Solving for variable 'x'.

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

Add '-3x' to each side of the equation.
7x + -3x = -21 + 3x + -3x

Combine like terms: 7x + -3x = 4x
4x = -21 + 3x + -3x

Combine like terms: 3x + -3x = 0
4x = -21 + 0
4x = -21

Divide each side by '4'.
x = -5.25

Simplifying
x = -5.25

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