7(3n-3)=42n

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Solution for 7(3n-3)=42n equation:


Simplifying
7(3n + -3) = 42n

Reorder the terms:
7(-3 + 3n) = 42n
(-3 * 7 + 3n * 7) = 42n
(-21 + 21n) = 42n

Solving
-21 + 21n = 42n

Solving for variable 'n'.

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

Add '-42n' to each side of the equation.
-21 + 21n + -42n = 42n + -42n

Combine like terms: 21n + -42n = -21n
-21 + -21n = 42n + -42n

Combine like terms: 42n + -42n = 0
-21 + -21n = 0

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

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

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

Divide each side by '-21'.
n = -1

Simplifying
n = -1

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