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chubhunter [2.5K]
3 years ago
14

21-x=13 telllllllllll mee​

Mathematics
2 answers:
lina2011 [118]3 years ago
7 0

Answer:

x = 8

Step-by-step explanation:

21 - x = 13 \\  - x = 13 - 21 \\  - x =  - 8 \\ x = 8

BaLLatris [955]3 years ago
4 0

Answer:

x = 8

Step-by-step explanation:

21-x=13 \\ x = 21 - 13 \\ x = 8

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Jada solved the equation Negative StartFraction 4 over 9 EndFraction = StartFraction x over 108 EndFraction for x using the step
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Answer:

Jada should have multiplied both sides of the equation by 108.

Step-by-step explanation:

The question is incomplete. Find the complete question in the comment section.

Given the equation -4/9 = x/108, in order to determine Jada's error, we need to solve in our own way as shown:

Step 1: Multiply both sides of the equation by -9/4 as shown:

-4/9 × -9/4 = x/108 × -9/4

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1 = -9x/432

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Cross multiplying

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x = -48

It can also be solved like this:

Given -4/9 = x/108

Multiply both sides by 108 to have:

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-4/9 * 108 = 108x/108

-432/9 = x

x = -48

Jada should have simply follow the second calculation by multiplying both sides of the equation by 108 as shown.

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Step-by-step explanation:

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