-18=4n+9n

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Solution for -18=4n+9n equation:


Simplifying
-18 = 4n + 9n

Combine like terms: 4n + 9n = 13n
-18 = 13n

Solving
-18 = 13n

Solving for variable 'n'.

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

Add '-13n' to each side of the equation.
-18 + -13n = 13n + -13n

Combine like terms: 13n + -13n = 0
-18 + -13n = 0

Add '18' to each side of the equation.
-18 + 18 + -13n = 0 + 18

Combine like terms: -18 + 18 = 0
0 + -13n = 0 + 18
-13n = 0 + 18

Combine like terms: 0 + 18 = 18
-13n = 18

Divide each side by '-13'.
n = -1.384615385

Simplifying
n = -1.384615385

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