y+18=-21

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Solution for y+18=-21 equation: 


Simplifying
y + 18 = -21

Reorder the terms:
18 + y = -21

Solving
18 + y = -21

Solving for variable 'y'.

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

Add '-18' to each side of the equation.
18 + -18 + y = -21 + -18

Combine like terms: 18 + -18 = 0
0 + y = -21 + -18
y = -21 + -18

Combine like terms: -21 + -18 = -39
y = -39

Simplifying
y = -39

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