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2a+3=2\left(2a-1\right)
Variable a cannot be equal to \frac{1}{2} since division by zero is not defined. Multiply both sides of the equation by 2\left(2a-1\right).
2a+3=4a-2
Use the distributive property to multiply 2 by 2a-1.
2a+3-4a=-2
Subtract 4a from both sides.
-2a+3=-2
Combine 2a and -4a to get -2a.
-2a=-2-3
Subtract 3 from both sides.
-2a=-5
Subtract 3 from -2 to get -5.
a=\frac{-5}{-2}
Divide both sides by -2.
a=\frac{5}{2}
Fraction \frac{-5}{-2} can be simplified to \frac{5}{2} by removing the negative sign from both the numerator and the denominator.