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3 years ago

Nadia solved the equation 4x-4=20!4x=16 x=4what error did she make

Mathematics

2 answers:

irakobra [83]3 years ago

8 0

4(4) -4 = 16-4 = 12
She was wrong because she thought that x= 6

telo118 [61]3 years ago

6 0

The error is 20 is not the answer for 16-4

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JulsSmile [24]

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the correct choice is marked

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Let x represent the smaller number. Then the larger number is 8x, and the difference is ...

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_____

<em>Additional comment</em>

Effectively, we have solved for the multiplier (40) that gives the ratio with 320 on top and a difference between top and bottom of 280:

$\dfrac{8}{1}=\dfrac{8\cdot40}{1\cdot40}=\dfrac{320}{40}$

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