82+7-a=30

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Solution for 82+7-a=30 equation:


Simplifying
82 + 7 + -1a = 30

Combine like terms: 82 + 7 = 89
89 + -1a = 30

Solving
89 + -1a = 30

Solving for variable 'a'.

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

Add '-89' to each side of the equation.
89 + -89 + -1a = 30 + -89

Combine like terms: 89 + -89 = 0
0 + -1a = 30 + -89
-1a = 30 + -89

Combine like terms: 30 + -89 = -59
-1a = -59

Divide each side by '-1'.
a = 59

Simplifying
a = 59

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