Question

Daca 2a+5b/4a+3b = 1,2 atunci calculati a/b

Answer 1

2a+5b/4a+3b=1,2
2a+5b/4a+3b=12/10
10×(2a+5b)=12×(4a+3b)
20a+50b=48a+36b
20a-48a=-50b+36b
-28a=-14b
a=-14b/-28
a=14b/28  care se simplifica cu 14
a=b/2
deci raportul a/b=b/2/b=b/2:b=b/2×1/b=b/2b care se simplifica cu b=1/2