Respuesta:
a) x = 13
Explicación paso a paso:
[tex]\frac{45}{x + 7} = \frac{9}{4} \\(45).(4) = (x + 7).(9)\\180 = 9x + 63\\180 - 63 = 9x\\117 = 9x\\x = \frac{117}{9}\\x = 13[/tex]
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Respuesta:
a) x = 13
Explicación paso a paso:
[tex]\frac{45}{x + 7} = \frac{9}{4} \\(45).(4) = (x + 7).(9)\\180 = 9x + 63\\180 - 63 = 9x\\117 = 9x\\x = \frac{117}{9}\\x = 13[/tex]