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What is the value of b? b+21° b-48° b-50°​

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El valor de la variable b es de b = -1

Step-by-step explanation:
Para poder obtener el valor de la variable b, debemos efectuar una separación de términos, paso por paso:
1.- Reescribimos la ecuacion:
7b - 2/5 = 6b - 7/5
2.- Agrupamos variables del lado izquierdo y términos independientes del lado derecho
7b - 6b = 2/5 - 7/5
3.- Resolvemos la operaciones y obtenemos su valor directo
b = -5/5 simplificamos
b = -1 es el valor de la variable b
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