7-2n=8n-(-42)

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Solution for 7-2n=8n-(-42) equation:


Simplifying
7 + -2n = 8n + -1(-42)

Multiply -1 * -42
7 + -2n = 8n + 42

Reorder the terms:
7 + -2n = 42 + 8n

Solving
7 + -2n = 42 + 8n

Solving for variable 'n'.

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

Add '-8n' to each side of the equation.
7 + -2n + -8n = 42 + 8n + -8n

Combine like terms: -2n + -8n = -10n
7 + -10n = 42 + 8n + -8n

Combine like terms: 8n + -8n = 0
7 + -10n = 42 + 0
7 + -10n = 42

Add '-7' to each side of the equation.
7 + -7 + -10n = 42 + -7

Combine like terms: 7 + -7 = 0
0 + -10n = 42 + -7
-10n = 42 + -7

Combine like terms: 42 + -7 = 35
-10n = 35

Divide each side by '-10'.
n = -3.5

Simplifying
n = -3.5

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