0.008. Hope it helped! If you want an explanation you may ask..
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I think this is going to help you understand the concept and hope that the answer is correct. Thanks for understanding.
Answer:
131x
Step-by-step explanation:
7x² + 6x + 9x² - 5x
49x + 6x + 81x - 5x
136x - 5x
131x
0 = 42 - 6x
0 = -6(x - 7)
x = 7