1. Begin by simplifying the equation: 4x + 5 + 7 = 9.
2. Combine the constant terms on the left side:
4x + 12 = 9.
3. Subtract 12 from both sides:
4x = 9 - 12.
4. Simplify the right side:
4x = -3.
5. Divide both sides by 4 to solve for x:
x = \frac{-3}{4}.
6. Therefore, the solution is:
x = -0.75.