A notebook costs three times as much as a pen. If a pen costs $1.50, how much will Lyle pay for 4 notebooks?
Як дафтарча се маротиба бештар аз як қалам арзиш дорад. Агар як қалам $1.50 арзиш дошта бошад, Лайл барои 4 дафтарча чанд пул пардохт мекунад?
How much does a notebook cost? ** A notebook costs $1.50 x 3 = $<<1.5*3=4.50>>4.50.
How much will Lyle pay for the 4 notebooks? ** So Lyle will pay $4.50 x 4 = $<<4*4.5=18>>18 for the 4 notebooks.
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How much does a notebook cost? ** A notebook costs $1.50 x 3 = $<<1.5*3=4.50>>4.50.  
How much will Lyle pay for the 4 notebooks? ** So Lyle will pay $4.50 x 4 = $<<4*4.5=18>>18 for the 4 notebooks.  
#### 18