4x=21-3x

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Solution for 4x=21-3x equation: 


Simplifying
4x = 21 + -3x

Solving
4x = 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.
4x + 3x = 21 + -3x + 3x

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

Combine like terms: -3x + 3x = 0
7x = 21 + 0
7x = 21

Divide each side by '7'.
x = 3

Simplifying
x = 3

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