Question

ПОМОГИТЕ СРОООЧНОО!
$\frac{3x+7}{5x-1}+\frac{5x-1}{3x+7}=5,2$

Answer 1

(3x+7)/(5x-1)=t≠0
3x+7≠0;x≠-7/3
5x-1≠0;x≠1/5;x≠0,2

t+1/t=5,2
t²-5,2t+1=0
D/4=6,76-1=5,76
t=(2,6±2,4)
t1=5;t2=0,2
1)(3x+7)/(5x-1)=5

x=6/11
2)(3x+7)/(5x-1)=0,2

x=-3,6