5(n-5)+4(n-10)=-5n+9n

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Solution for 5(n-5)+4(n-10)=-5n+9n equation:


Simplifying
5(n + -5) + 4(n + -10) = -5n + 9n

Reorder the terms:
5(-5 + n) + 4(n + -10) = -5n + 9n
(-5 * 5 + n * 5) + 4(n + -10) = -5n + 9n
(-25 + 5n) + 4(n + -10) = -5n + 9n

Reorder the terms:
-25 + 5n + 4(-10 + n) = -5n + 9n
-25 + 5n + (-10 * 4 + n * 4) = -5n + 9n
-25 + 5n + (-40 + 4n) = -5n + 9n

Reorder the terms:
-25 + -40 + 5n + 4n = -5n + 9n

Combine like terms: -25 + -40 = -65
-65 + 5n + 4n = -5n + 9n

Combine like terms: 5n + 4n = 9n
-65 + 9n = -5n + 9n

Combine like terms: -5n + 9n = 4n
-65 + 9n = 4n

Solving
-65 + 9n = 4n

Solving for variable 'n'.

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

Add '-4n' to each side of the equation.
-65 + 9n + -4n = 4n + -4n

Combine like terms: 9n + -4n = 5n
-65 + 5n = 4n + -4n

Combine like terms: 4n + -4n = 0
-65 + 5n = 0

Add '65' to each side of the equation.
-65 + 65 + 5n = 0 + 65

Combine like terms: -65 + 65 = 0
0 + 5n = 0 + 65
5n = 0 + 65

Combine like terms: 0 + 65 = 65
5n = 65

Divide each side by '5'.
n = 13

Simplifying
n = 13

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