Y+y+7=21

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Solution for Y+y+7=21 equation:


Simplifying
Y + y + 7 = 21

Reorder the terms:
7 + Y + y = 21

Solving
7 + Y + y = 21

Solving for variable 'Y'.

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

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

Reorder the terms:
7 + -7 + Y + y = 21 + -7

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

Combine like terms: 21 + -7 = 14
Y + y = 14

Add '-1y' to each side of the equation.
Y + y + -1y = 14 + -1y

Combine like terms: y + -1y = 0
Y + 0 = 14 + -1y
Y = 14 + -1y

Simplifying
Y = 14 + -1y

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