78=-7(2-3n)-5(4+n)

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Solution for 78=-7(2-3n)-5(4+n) equation:


Simplifying
78 = -7(2 + -3n) + -5(4 + n)
78 = (2 * -7 + -3n * -7) + -5(4 + n)
78 = (-14 + 21n) + -5(4 + n)
78 = -14 + 21n + (4 * -5 + n * -5)
78 = -14 + 21n + (-20 + -5n)

Reorder the terms:
78 = -14 + -20 + 21n + -5n

Combine like terms: -14 + -20 = -34
78 = -34 + 21n + -5n

Combine like terms: 21n + -5n = 16n
78 = -34 + 16n

Solving
78 = -34 + 16n

Solving for variable 'n'.

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

Add '-16n' to each side of the equation.
78 + -16n = -34 + 16n + -16n

Combine like terms: 16n + -16n = 0
78 + -16n = -34 + 0
78 + -16n = -34

Add '-78' to each side of the equation.
78 + -78 + -16n = -34 + -78

Combine like terms: 78 + -78 = 0
0 + -16n = -34 + -78
-16n = -34 + -78

Combine like terms: -34 + -78 = -112
-16n = -112

Divide each side by '-16'.
n = 7

Simplifying
n = 7

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