2-y=21

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Solution for 2-y=21 equation:


Simplifying
2 + -1y = 21

Solving
2 + -1y = 21

Solving for variable 'y'.

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

Add '-2' to each side of the equation.
2 + -2 + -1y = 21 + -2

Combine like terms: 2 + -2 = 0
0 + -1y = 21 + -2
-1y = 21 + -2

Combine like terms: 21 + -2 = 19
-1y = 19

Divide each side by '-1'.
y = -19

Simplifying
y = -19

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