a=2a+(-3)

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Solution for a=2a+(-3) equation: 


Simplifying
a = 2a + (-3)
a = 2a + -3

Reorder the terms:
a = -3 + 2a

Solving
a = -3 + 2a

Solving for variable 'a'.

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

Add '-2a' to each side of the equation.
a + -2a = -3 + 2a + -2a

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

Combine like terms: 2a + -2a = 0
-1a = -3 + 0
-1a = -3

Divide each side by '-1'.
a = 3

Simplifying
a = 3

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