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im pretty sure when you change the sign in an equation you actually have to change all of them so the equation would be 3+5+7. Am i correct?

im pretty sure when you change the sign in an equation you actually have to change all of them so the equation would be 357 Am i correct class=

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Answer:

1

Step-by-step explanation:

Mistake in the second step.

We must add positive numbers or negative ones.

Here he had add the positive and negative numbers and that is the mistake

[tex]=3-(-5)-7\\\\=3+5-7[/tex]Here 5 is positive because -×-=+

[tex]=8-7[/tex]

[tex]=1[/tex]

In the second step, we must add the positives that are 3 and 5 and subtract from 7.

Hope it will help you.

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