Answer:
I think this is 15.75x+21.
Explanation:
you need to start by adding 0.25 and 1.50 and then add 3x+6x, and then 8+4, making the equation now 1.75(9x+12).
Finally, multiply 1.75 by 9x, getting 15.75. Lastly, multiply 1.75 by 12, getting 21.
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