Y-4z=21

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Solution for Y-4z=21 equation: 


Simplifying
Y + -4z = 21

Solving
Y + -4z = 21

Solving for variable 'Y'.

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

Add '4z' to each side of the equation.
Y + -4z + 4z = 21 + 4z

Combine like terms: -4z + 4z = 0
Y + 0 = 21 + 4z
Y = 21 + 4z

Simplifying
Y = 21 + 4z

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