1-1-1-1-1-1-1=1a

Solution for 1-1-1-1-1-1-1=1a equation:

Simplifying
1 + -1 + -1 + -1 + -1 + -1 + -1 = 1a

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

Combine like terms: -1 + -1 = -2
-2 + -1 + -1 + -1 = 1a

Combine like terms: -2 + -1 = -3
-3 + -1 + -1 = 1a

Combine like terms: -3 + -1 = -4
-4 + -1 = 1a

Combine like terms: -4 + -1 = -5
-5 = 1a

Solving
-5 = 1a

Solving for variable 'a'.

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

Add '-1a' to each side of the equation.
-5 + -1a = 1a + -1a

Combine like terms: 1a + -1a = 0
-5 + -1a = 0

Add '5' to each side of the equation.
-5 + 5 + -1a = 0 + 5

Combine like terms: -5 + 5 = 0
0 + -1a = 0 + 5
-1a = 0 + 5

Combine like terms: 0 + 5 = 5
-1a = 5

Divide each side by '-1'.
a = -5

Simplifying
a = -5