4x-21=-y

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Solution for 4x-21=-y equation:


Simplifying
4x + -21 = -1y

Reorder the terms:
-21 + 4x = -1y

Solving
-21 + 4x = -1y

Solving for variable 'x'.

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

Add '21' to each side of the equation.
-21 + 21 + 4x = 21 + -1y

Combine like terms: -21 + 21 = 0
0 + 4x = 21 + -1y
4x = 21 + -1y

Divide each side by '4'.
x = 5.25 + -0.25y

Simplifying
x = 5.25 + -0.25y

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