4(3-5n)+7(5-4n)=320

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Solution for 4(3-5n)+7(5-4n)=320 equation:


Simplifying
4(3 + -5n) + 7(5 + -4n) = 320
(3 * 4 + -5n * 4) + 7(5 + -4n) = 320
(12 + -20n) + 7(5 + -4n) = 320
12 + -20n + (5 * 7 + -4n * 7) = 320
12 + -20n + (35 + -28n) = 320

Reorder the terms:
12 + 35 + -20n + -28n = 320

Combine like terms: 12 + 35 = 47
47 + -20n + -28n = 320

Combine like terms: -20n + -28n = -48n
47 + -48n = 320

Solving
47 + -48n = 320

Solving for variable 'n'.

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

Add '-47' to each side of the equation.
47 + -47 + -48n = 320 + -47

Combine like terms: 47 + -47 = 0
0 + -48n = 320 + -47
-48n = 320 + -47

Combine like terms: 320 + -47 = 273
-48n = 273

Divide each side by '-48'.
n = -5.6875

Simplifying
n = -5.6875

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