Respuesta :

Answer:

[tex]b = \frac{4y}{5l + 5s} [/tex]

Step-by-step explanation:

[tex] \frac{4y}{5b} = l + s[/tex]

multiplying through by the L.C.M. which is 5b

[tex] \frac{4y}{5b} \times 5b = (l + s) \times 5b[/tex]

cancel out

4y =5bL+ 5bs

factorizing b out

4y=b ( 5L +5s ).

making be the subject by dividing through by ( 5L+ 5s )

[tex] \frac{4y}{5l + 5s} = \frac{b(5l + 5s)}{5l + 5s} [/tex]

[tex]b = \frac{4y}{5l + 5s} [/tex]