Pasos:
b * 3 + 7= 28
Restar 7 de ambos lados:
b * 3 + 7 - 7 = 28 - 7
Simplificar:
b * 3 =21
b = 21/3
b = 7
b × 3 + 7 = 28
b × 3 = 28 - 7
b × 3 = 21
b = 21 ÷ 3
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Pasos:
b * 3 + 7= 28
Restar 7 de ambos lados:
b * 3 + 7 - 7 = 28 - 7
Simplificar:
b * 3 =21
b = 21/3
b = 7
b × 3 + 7 = 28
b × 3 = 28 - 7
b × 3 = 21
b = 21 ÷ 3
b = 7
Respuesta:
b=7