3n-7n=3(5n-7)-3(8n+3)

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Solution for 3n-7n=3(5n-7)-3(8n+3) equation:


Simplifying
3n + -7n = 3(5n + -7) + -3(8n + 3)

Combine like terms: 3n + -7n = -4n
-4n = 3(5n + -7) + -3(8n + 3)

Reorder the terms:
-4n = 3(-7 + 5n) + -3(8n + 3)
-4n = (-7 * 3 + 5n * 3) + -3(8n + 3)
-4n = (-21 + 15n) + -3(8n + 3)

Reorder the terms:
-4n = -21 + 15n + -3(3 + 8n)
-4n = -21 + 15n + (3 * -3 + 8n * -3)
-4n = -21 + 15n + (-9 + -24n)

Reorder the terms:
-4n = -21 + -9 + 15n + -24n

Combine like terms: -21 + -9 = -30
-4n = -30 + 15n + -24n

Combine like terms: 15n + -24n = -9n
-4n = -30 + -9n

Solving
-4n = -30 + -9n

Solving for variable 'n'.

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

Add '9n' to each side of the equation.
-4n + 9n = -30 + -9n + 9n

Combine like terms: -4n + 9n = 5n
5n = -30 + -9n + 9n

Combine like terms: -9n + 9n = 0
5n = -30 + 0
5n = -30

Divide each side by '5'.
n = -6

Simplifying
n = -6

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