J-9=12

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Solution for J-9=12 equation: 


Simplifying
J + -9 = 12

Reorder the terms:
-9 + J = 12

Solving
-9 + J = 12

Solving for variable 'J'.

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

Add '9' to each side of the equation.
-9 + 9 + J = 12 + 9

Combine like terms: -9 + 9 = 0
0 + J = 12 + 9
J = 12 + 9

Combine like terms: 12 + 9 = 21
J = 21

Simplifying
J = 21

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