Răspuns :
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:
[tex]\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[/tex]