To solve the first equation, we need to find the value of x.

We can start by simplifying the fractions in the equation:

2 2/3 = 8/3
7.125 = 71/10

Now, we can rewrite the equation as:
8/3 * x = 71/10

To solve for x, we can cross multiply:

8 10 = 3 71
80 = 213

Since 80 is not equal to 213, there is no solution to the first equation.

Moving on to the second equation:

1.75 = 7/4
3.25 = 13/4

Now, we can rewrite the equation as:
7/4 / 13/4 = 15/x

When dividing fractions, we can multiply by the reciprocal of the divisor:

7/4 * 4/13 = 15/x
28/52 = 15/x

Now we can simplify the fraction:

28/52 = 14/26 = 7/13

So, the solution to the second equation is x = 13.