7j-21=3j

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Solution for 7j-21=3j equation:


Simplifying
7j + -21 = 3j

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

Solving
-21 + 7j = 3j

Solving for variable 'j'.

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

Add '-3j' to each side of the equation.
-21 + 7j + -3j = 3j + -3j

Combine like terms: 7j + -3j = 4j
-21 + 4j = 3j + -3j

Combine like terms: 3j + -3j = 0
-21 + 4j = 0

Add '21' to each side of the equation.
-21 + 21 + 4j = 0 + 21

Combine like terms: -21 + 21 = 0
0 + 4j = 0 + 21
4j = 0 + 21

Combine like terms: 0 + 21 = 21
4j = 21

Divide each side by '4'.
j = 5.25

Simplifying
j = 5.25

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