√1.69 (2√x +√$\frac{81}{121}$ )=$\frac{13}{10}$
⇒1. 69 (2√x + $\frac{9}{11}$ )= $\frac{13}{10}$
⇒2√x + $\frac{9}{11}$ = $\frac{13}{10}$ : 69
⇒2√x + $\frac{9}{11}$ = $\frac{13}{690}$
⇒2√x = $\frac{13}{690}$ - $\frac{9}{11}$
⇒2√x = - $\frac{6067}{7590}$
⇒√x = - $\frac{6067}{7590}$ : 2
⇒√x = - $\frac{6067}{15180}$
