Question

19a-7b+12,если 5а-8b+2/8a-5b+2=3

Answer 1

(5а-8b+2)/(8a-5b+2)=3
24a-15b+6=5a-8b+2
24a-5a-15+8b=2-6
19a-7b=-4
19a-7b+12=-4+12=8