-21=18y

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Solution for -21=18y equation:


Simplifying
-21 = 18y

Solving
-21 = 18y

Solving for variable 'y'.

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

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

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

Add '21' to each side of the equation.
-21 + 21 + -18y = 0 + 21

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

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

Divide each side by '-18'.
y = -1.166666667

Simplifying
y = -1.166666667

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