12.5(n-1)=40

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Solution for 12.5(n-1)=40 equation:


Simplifying
12.5(n + -1) = 40

Reorder the terms:
12.5(-1 + n) = 40
(-1 * 12.5 + n * 12.5) = 40
(-12.5 + 12.5n) = 40

Solving
-12.5 + 12.5n = 40

Solving for variable 'n'.

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

Add '12.5' to each side of the equation.
-12.5 + 12.5 + 12.5n = 40 + 12.5

Combine like terms: -12.5 + 12.5 = 0.0
0.0 + 12.5n = 40 + 12.5
12.5n = 40 + 12.5

Combine like terms: 40 + 12.5 = 52.5
12.5n = 52.5

Divide each side by '12.5'.
n = 4.2

Simplifying
n = 4.2

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