2(n-9)-(8n-9)=-7n

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Solution for 2(n-9)-(8n-9)=-7n equation:


Simplifying
2(n + -9) + -1(8n + -9) = -7n

Reorder the terms:
2(-9 + n) + -1(8n + -9) = -7n
(-9 * 2 + n * 2) + -1(8n + -9) = -7n
(-18 + 2n) + -1(8n + -9) = -7n

Reorder the terms:
-18 + 2n + -1(-9 + 8n) = -7n
-18 + 2n + (-9 * -1 + 8n * -1) = -7n
-18 + 2n + (9 + -8n) = -7n

Reorder the terms:
-18 + 9 + 2n + -8n = -7n

Combine like terms: -18 + 9 = -9
-9 + 2n + -8n = -7n

Combine like terms: 2n + -8n = -6n
-9 + -6n = -7n

Solving
-9 + -6n = -7n

Solving for variable 'n'.

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

Add '7n' to each side of the equation.
-9 + -6n + 7n = -7n + 7n

Combine like terms: -6n + 7n = 1n
-9 + 1n = -7n + 7n

Combine like terms: -7n + 7n = 0
-9 + 1n = 0

Add '9' to each side of the equation.
-9 + 9 + 1n = 0 + 9

Combine like terms: -9 + 9 = 0
0 + 1n = 0 + 9
1n = 0 + 9

Combine like terms: 0 + 9 = 9
1n = 9

Divide each side by '1'.
n = 9

Simplifying
n = 9

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