3n-21=2+5(n-7)

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Solution for 3n-21=2+5(n-7) equation:


Simplifying
3n + -21 = 2 + 5(n + -7)

Reorder the terms:
-21 + 3n = 2 + 5(n + -7)

Reorder the terms:
-21 + 3n = 2 + 5(-7 + n)
-21 + 3n = 2 + (-7 * 5 + n * 5)
-21 + 3n = 2 + (-35 + 5n)

Combine like terms: 2 + -35 = -33
-21 + 3n = -33 + 5n

Solving
-21 + 3n = -33 + 5n

Solving for variable 'n'.

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

Add '-5n' to each side of the equation.
-21 + 3n + -5n = -33 + 5n + -5n

Combine like terms: 3n + -5n = -2n
-21 + -2n = -33 + 5n + -5n

Combine like terms: 5n + -5n = 0
-21 + -2n = -33 + 0
-21 + -2n = -33

Add '21' to each side of the equation.
-21 + 21 + -2n = -33 + 21

Combine like terms: -21 + 21 = 0
0 + -2n = -33 + 21
-2n = -33 + 21

Combine like terms: -33 + 21 = -12
-2n = -12

Divide each side by '-2'.
n = 6

Simplifying
n = 6

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