21n-57=342

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Solution for 21n-57=342 equation: 


Simplifying
21n + -57 = 342

Reorder the terms:
-57 + 21n = 342

Solving
-57 + 21n = 342

Solving for variable 'n'.

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

Add '57' to each side of the equation.
-57 + 57 + 21n = 342 + 57

Combine like terms: -57 + 57 = 0
0 + 21n = 342 + 57
21n = 342 + 57

Combine like terms: 342 + 57 = 399
21n = 399

Divide each side by '21'.
n = 19

Simplifying
n = 19

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