.85=1-1a

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Solution for .85=1-1a equation:


Simplifying
0.85 = 1 + -1a

Solving
0.85 = 1 + -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.
0.85 + a = 1 + -1a + a

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

Add '-0.85' to each side of the equation.
0.85 + -0.85 + a = 1 + -0.85

Combine like terms: 0.85 + -0.85 = 0.00
0.00 + a = 1 + -0.85
a = 1 + -0.85

Combine like terms: 1 + -0.85 = 0.15
a = 0.15

Simplifying
a = 0.15

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