Question

Daca a supra 4 = b supra 3 si a -b =5 , atunci a=?,b=?

Answer 1

a/4=b/3=>3a=4b
a-b=5   =>a=b+5 

Inlucuim.In loc de  a scriem b+5 in prima ecuatie:
3(b+5)=4b=>3b+15=4b=>b=15;
a=b+5=>a=20.