2-7n+5n=42-84

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Solution for 2-7n+5n=42-84 equation:


Simplifying
2 + -7n + 5n = 42 + -84

Combine like terms: -7n + 5n = -2n
2 + -2n = 42 + -84

Combine like terms: 42 + -84 = -42
2 + -2n = -42

Solving
2 + -2n = -42

Solving for variable 'n'.

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

Add '-2' to each side of the equation.
2 + -2 + -2n = -42 + -2

Combine like terms: 2 + -2 = 0
0 + -2n = -42 + -2
-2n = -42 + -2

Combine like terms: -42 + -2 = -44
-2n = -44

Divide each side by '-2'.
n = 22

Simplifying
n = 22

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