7+28n=42+21n

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Solution for 7+28n=42+21n equation:


Simplifying
7 + 28n = 42 + 21n

Solving
7 + 28n = 42 + 21n

Solving for variable 'n'.

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

Add '-21n' to each side of the equation.
7 + 28n + -21n = 42 + 21n + -21n

Combine like terms: 28n + -21n = 7n
7 + 7n = 42 + 21n + -21n

Combine like terms: 21n + -21n = 0
7 + 7n = 42 + 0
7 + 7n = 42

Add '-7' to each side of the equation.
7 + -7 + 7n = 42 + -7

Combine like terms: 7 + -7 = 0
0 + 7n = 42 + -7
7n = 42 + -7

Combine like terms: 42 + -7 = 35
7n = 35

Divide each side by '7'.
n = 5

Simplifying
n = 5

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