exam Maths Puzzle Numerical Ability

hey i need help with proofs. In the book Geometry, chapter 4, page 158, number 29. please help ASAP. thanks

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exam Other Question

hi thank you for helping me i have 5 problems i do not understand.

5x+2=2x-10

1/2B+4=1/8B+88

8-5P=4P-1

0.2X-8=-2-X

-4-3X=7X-6
Can someone please help me with this word problem! Thanks a lot.

If $3000 is invested in an account that pays interest compounded continuously, how long will it take to grow $6000 at 7%?