28=3n+4n

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Solution for 28=3n+4n equation:


Simplifying
28 = 3n + 4n

Combine like terms: 3n + 4n = 7n
28 = 7n

Solving
28 = 7n

Solving for variable 'n'.

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

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

Combine like terms: 7n + -7n = 0
28 + -7n = 0

Add '-28' to each side of the equation.
28 + -28 + -7n = 0 + -28

Combine like terms: 28 + -28 = 0
0 + -7n = 0 + -28
-7n = 0 + -28

Combine like terms: 0 + -28 = -28
-7n = -28

Divide each side by '-7'.
n = 4

Simplifying
n = 4

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