9-4j=2j-21

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Solution for 9-4j=2j-21 equation:


Simplifying
9 + -4j = 2j + -21

Reorder the terms:
9 + -4j = -21 + 2j

Solving
9 + -4j = -21 + 2j

Solving for variable 'j'.

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

Add '-2j' to each side of the equation.
9 + -4j + -2j = -21 + 2j + -2j

Combine like terms: -4j + -2j = -6j
9 + -6j = -21 + 2j + -2j

Combine like terms: 2j + -2j = 0
9 + -6j = -21 + 0
9 + -6j = -21

Add '-9' to each side of the equation.
9 + -9 + -6j = -21 + -9

Combine like terms: 9 + -9 = 0
0 + -6j = -21 + -9
-6j = -21 + -9

Combine like terms: -21 + -9 = -30
-6j = -30

Divide each side by '-6'.
j = 5

Simplifying
j = 5

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