3y+4x=21

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Solution for 3y+4x=21 equation: 


Simplifying
3y + 4x = 21

Reorder the terms:
4x + 3y = 21

Solving
4x + 3y = 21

Solving for variable 'x'.

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

Add '-3y' to each side of the equation.
4x + 3y + -3y = 21 + -3y

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

Divide each side by '4'.
x = 5.25 + -0.75y

Simplifying
x = 5.25 + -0.75y

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