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Tanzania [10]
3 years ago
9

I am thinking of a number.

Mathematics
2 answers:
Naddik [55]3 years ago
4 0

Answer:

Step-by-step explanation:

Charra [1.4K]3 years ago
3 0
9x-84=4x-18
5x=66
x=13.2
your number is 13.2
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800 + 16x = 720 + 21x. Cancel out the 720 to get 80 + 16x = 21x. Subtract 16x from both sides to get 80 = 5x. Divide by 5 to get 16 = x, or x = 16. 16 hours. The charge is 800 + 16(16), = 720 + 21(16) which = 800 + 256 = 720 + 336 which = 1,056 = 1,056. Hope this helped!

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