7Y-4=21

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Solution for 7Y-4=21 equation: 


Simplifying
7Y + -4 = 21

Reorder the terms:
-4 + 7Y = 21

Solving
-4 + 7Y = 21

Solving for variable 'Y'.

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

Add '4' to each side of the equation.
-4 + 4 + 7Y = 21 + 4

Combine like terms: -4 + 4 = 0
0 + 7Y = 21 + 4
7Y = 21 + 4

Combine like terms: 21 + 4 = 25
7Y = 25

Divide each side by '7'.
Y = 3.571428571

Simplifying
Y = 3.571428571

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