Question

exercitiul 35 punctul b va rog mult

Answer 1

Răspuns:

(2b+8)/(7b-5)=5/12

12*(2b+8)=5(7b-5)

24b+96=35b-25

96+25=35b-24b

121=11b

b=121/11=11

b=11

Explicație pas cu pas:

Answer 2

$\it \dfrac{5}{12}=\dfrac{2b+8}{7b-5} \Rightarrow 35b-25=24b+96 \Rightarrow 35b-24b=96+25 \Rightarrow \\ \\ \\ \Rightarrow 11b=121\Big|_{:11} \Rightarrow b=11$