-2y-15=4y+21

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Solution for -2y-15=4y+21 equation:


Simplifying
-2y + -15 = 4y + 21

Reorder the terms:
-15 + -2y = 4y + 21

Reorder the terms:
-15 + -2y = 21 + 4y

Solving
-15 + -2y = 21 + 4y

Solving for variable 'y'.

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

Add '-4y' to each side of the equation.
-15 + -2y + -4y = 21 + 4y + -4y

Combine like terms: -2y + -4y = -6y
-15 + -6y = 21 + 4y + -4y

Combine like terms: 4y + -4y = 0
-15 + -6y = 21 + 0
-15 + -6y = 21

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

Combine like terms: -15 + 15 = 0
0 + -6y = 21 + 15
-6y = 21 + 15

Combine like terms: 21 + 15 = 36
-6y = 36

Divide each side by '-6'.
y = -6

Simplifying
y = -6

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