7n-40=5(4n+5)

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Solution for 7n-40=5(4n+5) equation:


Simplifying
7n + -40 = 5(4n + 5)

Reorder the terms:
-40 + 7n = 5(4n + 5)

Reorder the terms:
-40 + 7n = 5(5 + 4n)
-40 + 7n = (5 * 5 + 4n * 5)
-40 + 7n = (25 + 20n)

Solving
-40 + 7n = 25 + 20n

Solving for variable 'n'.

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

Add '-20n' to each side of the equation.
-40 + 7n + -20n = 25 + 20n + -20n

Combine like terms: 7n + -20n = -13n
-40 + -13n = 25 + 20n + -20n

Combine like terms: 20n + -20n = 0
-40 + -13n = 25 + 0
-40 + -13n = 25

Add '40' to each side of the equation.
-40 + 40 + -13n = 25 + 40

Combine like terms: -40 + 40 = 0
0 + -13n = 25 + 40
-13n = 25 + 40

Combine like terms: 25 + 40 = 65
-13n = 65

Divide each side by '-13'.
n = -5

Simplifying
n = -5

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