3(-7j-4)=30

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Solution for 3(-7j-4)=30 equation:


Simplifying
3(-7j + -4) = 30

Reorder the terms:
3(-4 + -7j) = 30
(-4 * 3 + -7j * 3) = 30
(-12 + -21j) = 30

Solving
-12 + -21j = 30

Solving for variable 'j'.

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

Add '12' to each side of the equation.
-12 + 12 + -21j = 30 + 12

Combine like terms: -12 + 12 = 0
0 + -21j = 30 + 12
-21j = 30 + 12

Combine like terms: 30 + 12 = 42
-21j = 42

Divide each side by '-21'.
j = -2

Simplifying
j = -2

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