3n+7(n-3)=19

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Solution for 3n+7(n-3)=19 equation:


Simplifying
3n + 7(n + -3) = 19

Reorder the terms:
3n + 7(-3 + n) = 19
3n + (-3 * 7 + n * 7) = 19
3n + (-21 + 7n) = 19

Reorder the terms:
-21 + 3n + 7n = 19

Combine like terms: 3n + 7n = 10n
-21 + 10n = 19

Solving
-21 + 10n = 19

Solving for variable 'n'.

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

Add '21' to each side of the equation.
-21 + 21 + 10n = 19 + 21

Combine like terms: -21 + 21 = 0
0 + 10n = 19 + 21
10n = 19 + 21

Combine like terms: 19 + 21 = 40
10n = 40

Divide each side by '10'.
n = 4

Simplifying
n = 4

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