4(3+5n)=20

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Solution for 4(3+5n)=20 equation: 


Simplifying
4(3 + 5n) = 20
(3 * 4 + 5n * 4) = 20
(12 + 20n) = 20

Solving
12 + 20n = 20

Solving for variable 'n'.

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

Add '-12' to each side of the equation.
12 + -12 + 20n = 20 + -12

Combine like terms: 12 + -12 = 0
0 + 20n = 20 + -12
20n = 20 + -12

Combine like terms: 20 + -12 = 8
20n = 8

Divide each side by '20'.
n = 0.4

Simplifying
n = 0.4

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