You've uploaded an image with several math problems. I'll go ahead and address each of them one by one.

Let me know if you'd like a detailed explanation for each question, or if you prefer just the solutions. Here's a quick breakdown of the questions from the image:

a) Solve for $x$:
$5x - 7 = 3x + 9$

b) Solve for $x$:
$\frac{3}{4} x + 1 \frac{1}{2} = \frac{-4}{5}$

c) Solve for $x$:
$x + \frac{1}{2} = 25 \cdot 2^3$

d) Solve for $x$:
$\left( x + \frac{1}{2} \right)^2 = \frac{4}{25}$

e) Solve for $x$:
$5x - |9 - 7x| = 3$

f) Solve for $x$:
$-5 + 3 |x - 1| + 6 = | - 4 |$

g) Solve for $x$:
$|x + 1| + |x + 2| + |x + 3| = 4x$

I'll start solving them and let you know the steps. Would you like me to continue with the solutions for all the problems listed, or would you prefer to start with a specific one?