Respuesta :

bshawy89
x = 1.5 times (150-x) 

x = 225 -1.5x

2.5 x = 225

x= 90 


The more expensive book was $90

Check your answer: 

x = 1.5 times (150-x)

90 = 1.5 times (150-90)

90 = 1.5 x60 

90=90

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