j-8=-21

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Solution for j-8=-21 equation: 


Simplifying
j + -8 = -21

Reorder the terms:
-8 + j = -21

Solving
-8 + j = -21

Solving for variable 'j'.

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

Add '8' to each side of the equation.
-8 + 8 + j = -21 + 8

Combine like terms: -8 + 8 = 0
0 + j = -21 + 8
j = -21 + 8

Combine like terms: -21 + 8 = -13
j = -13

Simplifying
j = -13

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