2(1-7n)+3(7+4n)=31

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Solution for 2(1-7n)+3(7+4n)=31 equation:


Simplifying
2(1 + -7n) + 3(7 + 4n) = 31
(1 * 2 + -7n * 2) + 3(7 + 4n) = 31
(2 + -14n) + 3(7 + 4n) = 31
2 + -14n + (7 * 3 + 4n * 3) = 31
2 + -14n + (21 + 12n) = 31

Reorder the terms:
2 + 21 + -14n + 12n = 31

Combine like terms: 2 + 21 = 23
23 + -14n + 12n = 31

Combine like terms: -14n + 12n = -2n
23 + -2n = 31

Solving
23 + -2n = 31

Solving for variable 'n'.

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

Add '-23' to each side of the equation.
23 + -23 + -2n = 31 + -23

Combine like terms: 23 + -23 = 0
0 + -2n = 31 + -23
-2n = 31 + -23

Combine like terms: 31 + -23 = 8
-2n = 8

Divide each side by '-2'.
n = -4

Simplifying
n = -4

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