21-5X=Y

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Solution for 21-5X=Y equation: 


Simplifying
21 + -5X = Y

Solving
21 + -5X = Y

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 + -5X = -21 + Y

Combine like terms: 21 + -21 = 0
0 + -5X = -21 + Y
-5X = -21 + Y

Divide each side by '-5'.
X = 4.2 + -0.2Y

Simplifying
X = 4.2 + -0.2Y

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