12x – [3x3 + 5x2 - { 7x2 - (4 - 3x 3x]
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Answer:
I think the answer is 3x. Please mark me as brainliest
Step-by-step explanation:
12x-(9+10-(14-(4-9x)
=12x-(19-14)-(4-9x)
=12x-(4-4+9x)
=12x-4+4-9x
=3x
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