б)   ( 19 + 2 x ) − ( 5 x − 11 ) = 25

To solve the equation \[ (19 + 2x) - (5x - 11) = 25, \] we first simplify the left side of the equation. 1. Distribute the negative sign through the second parentheses: \[ (19 + 2x) - 5x + 11 = 25. \] 2. Combine like terms on the left side: \[ 19 + 11 + 2x - 5x = 25. \] This simplifies to: \[ 30 - 3x = 25. \] 3. Now, isolate the variable \(x\). Subtract 30 from both sides: \[ -3x = 25 - 30, \] which simplifies to: \[ -3x = -5. \] 4. Divide both sides by -3: \[ x = \frac{-5}{-3} = \frac{5}{3}. \] Thus, the solution is \[ x = \frac{5}{3}. \]