7y-4x=-21

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Solution for 7y-4x=-21 equation:


Simplifying
7y + -4x = -21

Reorder the terms:
-4x + 7y = -21

Solving
-4x + 7y = -21

Solving for variable 'x'.

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

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

Combine like terms: 7y + -7y = 0
-4x + 0 = -21 + -7y
-4x = -21 + -7y

Divide each side by '-4'.
x = 5.25 + 1.75y

Simplifying
x = 5.25 + 1.75y

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