7n-15=3n-7

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Solution for 7n-15=3n-7 equation:


Simplifying
7n + -15 = 3n + -7

Reorder the terms:
-15 + 7n = 3n + -7

Reorder the terms:
-15 + 7n = -7 + 3n

Solving
-15 + 7n = -7 + 3n

Solving for variable 'n'.

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

Add '-3n' to each side of the equation.
-15 + 7n + -3n = -7 + 3n + -3n

Combine like terms: 7n + -3n = 4n
-15 + 4n = -7 + 3n + -3n

Combine like terms: 3n + -3n = 0
-15 + 4n = -7 + 0
-15 + 4n = -7

Add '15' to each side of the equation.
-15 + 15 + 4n = -7 + 15

Combine like terms: -15 + 15 = 0
0 + 4n = -7 + 15
4n = -7 + 15

Combine like terms: -7 + 15 = 8
4n = 8

Divide each side by '4'.
n = 2

Simplifying
n = 2

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