21=1y+3x

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Solution for 21=1y+3x equation:


Simplifying
21 = 1y + 3x

Reorder the terms:
21 = 3x + 1y

Solving
21 = 3x + 1y

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.
21 + -3x = 3x + -3x + 1y

Combine like terms: 3x + -3x = 0
21 + -3x = 0 + 1y
21 + -3x = 1y

Add '-21' to each side of the equation.
21 + -21 + -3x = -21 + 1y

Combine like terms: 21 + -21 = 0
0 + -3x = -21 + 1y
-3x = -21 + 1y

Divide each side by '-3'.
x = 7 + -0.3333333333y

Simplifying
x = 7 + -0.3333333333y

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