y-4=-21

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Solution for y-4=-21 equation: 


Simplifying
y + -4 = -21

Reorder the terms:
-4 + y = -21

Solving
-4 + y = -21

Solving for variable 'y'.

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

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

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

Combine like terms: -21 + 4 = -17
y = -17

Simplifying
y = -17

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