All you need to do it combine like terms.
3x + 9 + 4x + x
(3x + 4x + x) + 9
8x + 9
i hope this was helpful for you!
For the first one a = 2.5. For the second one m = 4. For the third one m = -4
Answer:
A≈706.86
Step-by-step explanation:
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I’m sorry I can’t help you, i would need more information