Question

a/b=b/c , a+b=60 ,b+c=30 , CALCULAR : B

Answer 1

Respuesta:

B = 20

Explicación paso a paso:

${b}^{2} = ac \\ {b}^{2} = (60 - b)(30 - b) \\ {b}^{2} = 180 - 60b - 30b + {b}^{2} \\ 90b = 180 \\ b = 20$