7(-j-4)+21=-3

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Solution for 7(-j-4)+21=-3 equation:


Simplifying
7(-1j + -4) + 21 = -3

Reorder the terms:
7(-4 + -1j) + 21 = -3
(-4 * 7 + -1j * 7) + 21 = -3
(-28 + -7j) + 21 = -3

Reorder the terms:
-28 + 21 + -7j = -3

Combine like terms: -28 + 21 = -7
-7 + -7j = -3

Solving
-7 + -7j = -3

Solving for variable 'j'.

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

Add '7' to each side of the equation.
-7 + 7 + -7j = -3 + 7

Combine like terms: -7 + 7 = 0
0 + -7j = -3 + 7
-7j = -3 + 7

Combine like terms: -3 + 7 = 4
-7j = 4

Divide each side by '-7'.
j = -0.5714285714

Simplifying
j = -0.5714285714

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