2n-4=90

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Solution for 2n-4=90 equation: 


Simplifying
2n + -4 = 90

Reorder the terms:
-4 + 2n = 90

Solving
-4 + 2n = 90

Solving for variable 'n'.

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

Add '4' to each side of the equation.
-4 + 4 + 2n = 90 + 4

Combine like terms: -4 + 4 = 0
0 + 2n = 90 + 4
2n = 90 + 4

Combine like terms: 90 + 4 = 94
2n = 94

Divide each side by '2'.
n = 47

Simplifying
n = 47

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