21+4(2n-9)=1

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Solution for 21+4(2n-9)=1 equation: 


Simplifying
21 + 4(2n + -9) = 1

Reorder the terms:
21 + 4(-9 + 2n) = 1
21 + (-9 * 4 + 2n * 4) = 1
21 + (-36 + 8n) = 1

Combine like terms: 21 + -36 = -15
-15 + 8n = 1

Solving
-15 + 8n = 1

Solving for variable 'n'.

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

Add '15' to each side of the equation.
-15 + 15 + 8n = 1 + 15

Combine like terms: -15 + 15 = 0
0 + 8n = 1 + 15
8n = 1 + 15

Combine like terms: 1 + 15 = 16
8n = 16

Divide each side by '8'.
n = 2

Simplifying
n = 2

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