0=1x+4y+-21

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Solution for 0=1x+4y+-21 equation: 


Simplifying
0 = 1x + 4y + -21

Reorder the terms:
0 = -21 + 1x + 4y

Solving
0 = -21 + 1x + 4y

Solving for variable 'x'.

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

Add '-1x' to each side of the equation.
0 + -1x = -21 + 1x + -1x + 4y
Remove the zero:
-1x = -21 + 1x + -1x + 4y

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

Divide each side by '-1'.
x = 21 + -4y

Simplifying
x = 21 + -4y

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