21+6y=8y-15

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Solution for 21+6y=8y-15 equation:


Simplifying
21 + 6y = 8y + -15

Reorder the terms:
21 + 6y = -15 + 8y

Solving
21 + 6y = -15 + 8y

Solving for variable 'y'.

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

Add '-8y' to each side of the equation.
21 + 6y + -8y = -15 + 8y + -8y

Combine like terms: 6y + -8y = -2y
21 + -2y = -15 + 8y + -8y

Combine like terms: 8y + -8y = 0
21 + -2y = -15 + 0
21 + -2y = -15

Add '-21' to each side of the equation.
21 + -21 + -2y = -15 + -21

Combine like terms: 21 + -21 = 0
0 + -2y = -15 + -21
-2y = -15 + -21

Combine like terms: -15 + -21 = -36
-2y = -36

Divide each side by '-2'.
y = 18

Simplifying
y = 18

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