21j+21=840

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Solution for 21j+21=840 equation: 


Simplifying
21j + 21 = 840

Reorder the terms:
21 + 21j = 840

Solving
21 + 21j = 840

Solving for variable 'j'.

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

Add '-21' to each side of the equation.
21 + -21 + 21j = 840 + -21

Combine like terms: 21 + -21 = 0
0 + 21j = 840 + -21
21j = 840 + -21

Combine like terms: 840 + -21 = 819
21j = 819

Divide each side by '21'.
j = 39

Simplifying
j = 39

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