Question

2a supra 3b = 1 supra 5 atunci a supra b= ? iar 3a +b supra 5a-b = ?

Answer 1

a/b*2/3=1/5 =>a/b=1/5:2/3=>a/b=1/5*3/2=>a/b=3/10=0,3
de mai sus inlocuiesti b cu 10a/3 si 5a cu 3b/2=>3a+b/5a-b=3a+10/3 supra 3b/2-b=>19a/3 supra b/2=>38a/3b=>38/3*a/b=>38/3*3/10=38/10=3,8