-21=j-8

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Solution for -21=j-8 equation:


Simplifying
-21 = j + -8

Reorder the terms:
-21 = -8 + j

Solving
-21 = -8 + j

Solving for variable 'j'.

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

Add '-1j' to each side of the equation.
-21 + -1j = -8 + j + -1j

Combine like terms: j + -1j = 0
-21 + -1j = -8 + 0
-21 + -1j = -8

Add '21' to each side of the equation.
-21 + 21 + -1j = -8 + 21

Combine like terms: -21 + 21 = 0
0 + -1j = -8 + 21
-1j = -8 + 21

Combine like terms: -8 + 21 = 13
-1j = 13

Divide each side by '-1'.
j = -13

Simplifying
j = -13

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