115+47=15-a

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Solution for 115+47=15-a equation:


Simplifying
115 + 47 = 15 + -1a

Combine like terms: 115 + 47 = 162
162 = 15 + -1a

Solving
162 = 15 + -1a

Solving for variable 'a'.

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

Add 'a' to each side of the equation.
162 + a = 15 + -1a + a

Combine like terms: -1a + a = 0
162 + a = 15 + 0
162 + a = 15

Add '-162' to each side of the equation.
162 + -162 + a = 15 + -162

Combine like terms: 162 + -162 = 0
0 + a = 15 + -162
a = 15 + -162

Combine like terms: 15 + -162 = -147
a = -147

Simplifying
a = -147

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