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aleksley [76]
3 years ago
10

Need help with number 54 only. Thx!

Mathematics
1 answer:
creativ13 [48]3 years ago
6 0
So, three and seven combine to make 10. Becoming good at mental math can be achieved by noticing things like this. Your mind should automatically see 43 and 17, know that 3 plus 7 equals 10. So there you have 50 plus 10 plus 27. Which is very simple to do. Your final answer will be 87.
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Answer:

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Step-by-step explanation:

4x-5=2\left(2x+1\right)

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