-3n+3(4n+15)=-21

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Solution for -3n+3(4n+15)=-21 equation:


Simplifying
-3n + 3(4n + 15) = -21

Reorder the terms:
-3n + 3(15 + 4n) = -21
-3n + (15 * 3 + 4n * 3) = -21
-3n + (45 + 12n) = -21

Reorder the terms:
45 + -3n + 12n = -21

Combine like terms: -3n + 12n = 9n
45 + 9n = -21

Solving
45 + 9n = -21

Solving for variable 'n'.

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

Add '-45' to each side of the equation.
45 + -45 + 9n = -21 + -45

Combine like terms: 45 + -45 = 0
0 + 9n = -21 + -45
9n = -21 + -45

Combine like terms: -21 + -45 = -66
9n = -66

Divide each side by '9'.
n = -7.333333333

Simplifying
n = -7.333333333

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