12(4+n)+5(-2n+9)=18

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Solution for 12(4+n)+5(-2n+9)=18 equation:


Simplifying
12(4 + n) + 5(-2n + 9) = 18
(4 * 12 + n * 12) + 5(-2n + 9) = 18
(48 + 12n) + 5(-2n + 9) = 18

Reorder the terms:
48 + 12n + 5(9 + -2n) = 18
48 + 12n + (9 * 5 + -2n * 5) = 18
48 + 12n + (45 + -10n) = 18

Reorder the terms:
48 + 45 + 12n + -10n = 18

Combine like terms: 48 + 45 = 93
93 + 12n + -10n = 18

Combine like terms: 12n + -10n = 2n
93 + 2n = 18

Solving
93 + 2n = 18

Solving for variable 'n'.

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

Add '-93' to each side of the equation.
93 + -93 + 2n = 18 + -93

Combine like terms: 93 + -93 = 0
0 + 2n = 18 + -93
2n = 18 + -93

Combine like terms: 18 + -93 = -75
2n = -75

Divide each side by '2'.
n = -37.5

Simplifying
n = -37.5

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