.9(n-30)=.5(n+10)

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Solution for .9(n-30)=.5(n+10) equation:


Simplifying
0.9(n + -30) = 0.5(n + 10)

Reorder the terms:
0.9(-30 + n) = 0.5(n + 10)
(-30 * 0.9 + n * 0.9) = 0.5(n + 10)
(-27 + 0.9n) = 0.5(n + 10)

Reorder the terms:
-27 + 0.9n = 0.5(10 + n)
-27 + 0.9n = (10 * 0.5 + n * 0.5)
-27 + 0.9n = (5 + 0.5n)

Solving
-27 + 0.9n = 5 + 0.5n

Solving for variable 'n'.

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

Add '-0.5n' to each side of the equation.
-27 + 0.9n + -0.5n = 5 + 0.5n + -0.5n

Combine like terms: 0.9n + -0.5n = 0.4n
-27 + 0.4n = 5 + 0.5n + -0.5n

Combine like terms: 0.5n + -0.5n = 0.0
-27 + 0.4n = 5 + 0.0
-27 + 0.4n = 5

Add '27' to each side of the equation.
-27 + 27 + 0.4n = 5 + 27

Combine like terms: -27 + 27 = 0
0 + 0.4n = 5 + 27
0.4n = 5 + 27

Combine like terms: 5 + 27 = 32
0.4n = 32

Divide each side by '0.4'.
n = 80

Simplifying
n = 80

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