Sal paid 4 cents per text.
Step-by-step explanation:
Given,
Total amount paid = $28
Total texts sent = 386
Fixed fee = $ 14.25
Let,
x be the cost per text
y be the total amount paid
y = 386x + 14.25
[tex]28=386x+14.25\\28-14.25=386x\\13.75=386x\\386x=13.75[/tex]
Dividing both sides by 386
[tex]\frac{386x}{386}=\frac{13.75}{386}\\x=0.36[/tex]
Cost per text = $0.036 = 0.04*100 = 04 cents
Sal paid 4 cents per text.
Keywords: equation, division
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