6. A surf board rental company charges
$25 for the first hour and $10 for each
additional hour. Which equation could be
solved to find the number, x, of
additional hours rented if the total cost of
the rental was $75?
a)25x + 10 = 75
b)25 + 10x = 75
2)75 - 25x = 10
d)25 - 10x = 75
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