7j-21=3+j

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Solution for 7j-21=3+j equation:


Simplifying
7j + -21 = 3 + j

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

Solving
-21 + 7j = 3 + 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 + 7j + -1j = 3 + j + -1j

Combine like terms: 7j + -1j = 6j
-21 + 6j = 3 + j + -1j

Combine like terms: j + -1j = 0
-21 + 6j = 3 + 0
-21 + 6j = 3

Add '21' to each side of the equation.
-21 + 21 + 6j = 3 + 21

Combine like terms: -21 + 21 = 0
0 + 6j = 3 + 21
6j = 3 + 21

Combine like terms: 3 + 21 = 24
6j = 24

Divide each side by '6'.
j = 4

Simplifying
j = 4

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