3(7-n)=4n-7

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


Simplifying
3(7 + -1n) = 4n + -7
(7 * 3 + -1n * 3) = 4n + -7
(21 + -3n) = 4n + -7

Reorder the terms:
21 + -3n = -7 + 4n

Solving
21 + -3n = -7 + 4n

Solving for variable 'n'.

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

Add '-4n' to each side of the equation.
21 + -3n + -4n = -7 + 4n + -4n

Combine like terms: -3n + -4n = -7n
21 + -7n = -7 + 4n + -4n

Combine like terms: 4n + -4n = 0
21 + -7n = -7 + 0
21 + -7n = -7

Add '-21' to each side of the equation.
21 + -21 + -7n = -7 + -21

Combine like terms: 21 + -21 = 0
0 + -7n = -7 + -21
-7n = -7 + -21

Combine like terms: -7 + -21 = -28
-7n = -28

Divide each side by '-7'.
n = 4

Simplifying
n = 4

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