x1*x3=2625 20*log(x1*(55+35+x3)*1/(55*(x3+35)))=2 20*log((1-(x3+75)*(x1+35))*1/(x1*(x3+75)))=2 20*log(x4*(x3+35+55)*1/(55*x3))=50

$$x_{1} x_{3} = 2625$$

/x1*(90 + x3)
20*log|————| = 2
55*(x3 + 35)/

$$20 log{left (frac{x_{1} left(x_{3} + 90right)}{55 left(x_{3} + 35right)} right )} = 2$$

/1 – (x3 + 75)*(x1 + 35)
20*log|———————–| = 2
x1*(x3 + 75) /

$$20 log{left (frac{1}{x_{1} left(x_{3} + 75right)} left(- left(x_{1} + 35right) left(x_{3} + 75right) + 1right) right )} = 2$$

/x4*(x3 + 35 + 55)
20*log|—————–| = 50
55*x3 /

$$20 log{left (frac{x_{4}}{55 x_{3}} left(x_{3} + 35 + 55right) right )} = 50$$

$$log((1 – (x3 + 75)*(x1 + 35))/(x1*(x3 + 75)))1 = frac{1}{10}$$
=
$$frac{1}{10}$$
=

0.1

$$log((x1*(90 + x3))/(55*(x3 + 35)))1 = frac{1}{10}$$
=
$$frac{1}{10}$$
=

0.1

$$x_{11} = frac{2625}{x_{3}}$$
=
$$frac{2625}{x_{3}}$$
=

2625/x3

$$log((x4*(x3 + 35 + 55))/(55*x3))1 = frac{5}{2}$$
=
$$frac{5}{2}$$
=

2.5