9-3(n-50)=30

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Solution for 9-3(n-50)=30 equation: 


Simplifying
9 + -3(n + -50) = 30

Reorder the terms:
9 + -3(-50 + n) = 30
9 + (-50 * -3 + n * -3) = 30
9 + (150 + -3n) = 30

Combine like terms: 9 + 150 = 159
159 + -3n = 30

Solving
159 + -3n = 30

Solving for variable 'n'.

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

Add '-159' to each side of the equation.
159 + -159 + -3n = 30 + -159

Combine like terms: 159 + -159 = 0
0 + -3n = 30 + -159
-3n = 30 + -159

Combine like terms: 30 + -159 = -129
-3n = -129

Divide each side by '-3'.
n = 43

Simplifying
n = 43

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