2(a)=a-1

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Solution for 2(a)=a-1 equation: 


Simplifying
2(a) = a + -1

Reorder the terms:
2a = -1 + a

Solving
2a = -1 + a

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.
2a + -1a = -1 + a + -1a

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

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

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

Simplifying
a = -1

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