6y-21=5y-15

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Solution for 6y-21=5y-15 equation: 


Simplifying
6y + -21 = 5y + -15

Reorder the terms:
-21 + 6y = 5y + -15

Reorder the terms:
-21 + 6y = -15 + 5y

Solving
-21 + 6y = -15 + 5y

Solving for variable 'y'.

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

Add '-5y' to each side of the equation.
-21 + 6y + -5y = -15 + 5y + -5y

Combine like terms: 6y + -5y = 1y
-21 + 1y = -15 + 5y + -5y

Combine like terms: 5y + -5y = 0
-21 + 1y = -15 + 0
-21 + 1y = -15

Add '21' to each side of the equation.
-21 + 21 + 1y = -15 + 21

Combine like terms: -21 + 21 = 0
0 + 1y = -15 + 21
1y = -15 + 21

Combine like terms: -15 + 21 = 6
1y = 6

Divide each side by '1'.
y = 6

Simplifying
y = 6

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