2y-21=-15

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Solution for 2y-21=-15 equation: 


Simplifying
2y + -21 = -15

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

Solving
-21 + 2y = -15

Solving for variable 'y'.

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

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 = 6
2y = 6

Divide each side by '2'.
y = 3

Simplifying
y = 3

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