21+3n=-8(4-7n)

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Solution for 21+3n=-8(4-7n) equation:


Simplifying
21 + 3n = -8(4 + -7n)
21 + 3n = (4 * -8 + -7n * -8)
21 + 3n = (-32 + 56n)

Solving
21 + 3n = -32 + 56n

Solving for variable 'n'.

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

Add '-56n' to each side of the equation.
21 + 3n + -56n = -32 + 56n + -56n

Combine like terms: 3n + -56n = -53n
21 + -53n = -32 + 56n + -56n

Combine like terms: 56n + -56n = 0
21 + -53n = -32 + 0
21 + -53n = -32

Add '-21' to each side of the equation.
21 + -21 + -53n = -32 + -21

Combine like terms: 21 + -21 = 0
0 + -53n = -32 + -21
-53n = -32 + -21

Combine like terms: -32 + -21 = -53
-53n = -53

Divide each side by '-53'.
n = 1

Simplifying
n = 1

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