4(2n-1)+5=21

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Solution for 4(2n-1)+5=21 equation:


Simplifying
4(2n + -1) + 5 = 21

Reorder the terms:
4(-1 + 2n) + 5 = 21
(-1 * 4 + 2n * 4) + 5 = 21
(-4 + 8n) + 5 = 21

Reorder the terms:
-4 + 5 + 8n = 21

Combine like terms: -4 + 5 = 1
1 + 8n = 21

Solving
1 + 8n = 21

Solving for variable 'n'.

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

Add '-1' to each side of the equation.
1 + -1 + 8n = 21 + -1

Combine like terms: 1 + -1 = 0
0 + 8n = 21 + -1
8n = 21 + -1

Combine like terms: 21 + -1 = 20
8n = 20

Divide each side by '8'.
n = 2.5

Simplifying
n = 2.5

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