Question

73.По б )))))))))))))))))))))))))))

Answer 1

$left { {{25+3b=5a} atop {14-3b=4a}} right. left { {{-5a+3b+25=0} atop {-4a-3b+14=0}} right. (-5a+3b+25)+(-4a-3b+14)=0 -5a+3b+25-4a-3b+14=0 -9a+39=0 -9a=-39$
$a= 4frac{1}{3}$
$14-3b=4* 4frac{1}{3}$
$-3b= 3frac{1}{3}$
$b=- 1frac{1}{9}$

Ответ:($4frac{1}{3}; -1frac{1}{9}$)