The initial amount, (original starting amount) is 18,000.
Let's simplify first
10x divided by 5 = 2x
Add 2x on 3 an you'll have 6x
And now you just combine like terms
which is x + 6x = 7x
So there's your answer 7x
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$6.24. This is because 1.44 / 6 = 0.24, and 0.24 x 26 = 6.24.