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I've been stuck, can someone help?

I've been stuck, can someone help?-example-1

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it is the second answer:

8x-x= 70

8 is 8 times bigger than out variable, x. None of them are negative which is true in the answer I have chosen. they both have a difference of 70. we put 8x first because it is 8 times bigger than x.
User Quentin Grisel
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