9-21=y-2+16

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Solution for 9-21=y-2+16 equation:


Simplifying
9 + -21 = y + -2 + 16

Combine like terms: 9 + -21 = -12
-12 = y + -2 + 16

Reorder the terms:
-12 = -2 + 16 + y

Combine like terms: -2 + 16 = 14
-12 = 14 + y

Solving
-12 = 14 + y

Solving for variable 'y'.

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

Add '-1y' to each side of the equation.
-12 + -1y = 14 + y + -1y

Combine like terms: y + -1y = 0
-12 + -1y = 14 + 0
-12 + -1y = 14

Add '12' to each side of the equation.
-12 + 12 + -1y = 14 + 12

Combine like terms: -12 + 12 = 0
0 + -1y = 14 + 12
-1y = 14 + 12

Combine like terms: 14 + 12 = 26
-1y = 26

Divide each side by '-1'.
y = -26

Simplifying
y = -26

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