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3 years ago

81+7x=81 what does x equal?

2 answers:

5 0

So to start off here is the question being asked:
81+7x=81
The first thing we are going to do is simplify both sides of the equation:
7x+81=81
Second thing to do is subtract 81 from both sides so:
7x+81−81=81−81
The final thing to do is divide both sides by 7:
7x/7=0/7
The final answer is:
x=0

I hope this helps! :)

Brrunno [24]3 years ago

4 0

The answer is x=7 because wen you subtract 81 from 81 it equals zero leving 7x or x=7

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Substitute this into the first equation:

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Multiply both sides by a :

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Move 4a to the left side:

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In the other case, we end up with the same numbers, but a and b are swapped.

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