2 Resolva as equações a) $\frac{3 x}{4}-\frac{2 x}{3}=\frac{1}{2}$

Step 1 ：Find a common denominator for the fractions: \(\text{lcm}(4, 3) = 12\)

Step 2 ：Multiply each term by the common denominator: \(12\left(\frac{3x}{4} - \frac{2x}{3}\right) = 12\left(\frac{1}{2}\right)\)

Step 3 ：Simplify the equation: \(9x - 8x = 6\)

Step 4 ：Solve for x: \(x = 6\)

Step 5 ：\(\boxed{x = 6}\)