1+2+3+4+5+a=

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Solution for 1+2+3+4+5+a= equation:


Simplifying
1 + 2 + 3 + 4 + 5 + a = 0

Combine like terms: 1 + 2 = 3
3 + 3 + 4 + 5 + a = 0

Combine like terms: 3 + 3 = 6
6 + 4 + 5 + a = 0

Combine like terms: 6 + 4 = 10
10 + 5 + a = 0

Combine like terms: 10 + 5 = 15
15 + a = 0

Solving
15 + a = 0

Solving for variable 'a'.

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

Add '-15' to each side of the equation.
15 + -15 + a = 0 + -15

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

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

Simplifying
a = -15

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