9n-9n=-7(1-9n)+7(-11-6n)

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Solution for 9n-9n=-7(1-9n)+7(-11-6n) equation:


Simplifying
9n + -9n = -7(1 + -9n) + 7(-11 + -6n)

Combine like terms: 9n + -9n = 0
0 = -7(1 + -9n) + 7(-11 + -6n)
0 = (1 * -7 + -9n * -7) + 7(-11 + -6n)
0 = (-7 + 63n) + 7(-11 + -6n)
0 = -7 + 63n + (-11 * 7 + -6n * 7)
0 = -7 + 63n + (-77 + -42n)

Reorder the terms:
0 = -7 + -77 + 63n + -42n

Combine like terms: -7 + -77 = -84
0 = -84 + 63n + -42n

Combine like terms: 63n + -42n = 21n
0 = -84 + 21n

Solving
0 = -84 + 21n

Solving for variable 'n'.

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

Add '-21n' to each side of the equation.
0 + -21n = -84 + 21n + -21n
Remove the zero:
-21n = -84 + 21n + -21n

Combine like terms: 21n + -21n = 0
-21n = -84 + 0
-21n = -84

Divide each side by '-21'.
n = 4

Simplifying
n = 4

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