0
$\begingroup$

I have a question about basic algebra. Ofcourse, you can add something to both sides to make the equation hold true, but where can you not?

Here for example: $10x(3)=10$ and adding 10 to both sides $10x(3+10)=20$ is not going to hold true. Is there like a list I could look at for those kinds of rules?

I'm watching a video of a teacher explaining how to solve a quadratic equation and he just casually adds something to a multiplication and the same on the other side. So I don't really understood how it's possible since on the one side we are not multiplying and on the other we do, that can't really hold the same value?

$\endgroup$
1
  • 2
    $\begingroup$ Adding 10 to 10x(3) is 10x(3)+10! Be careful with brackets $\endgroup$ – QuIcKmAtHs Jan 5 '18 at 6:00
1
$\begingroup$

You have to add the same number to both sides. You added $10(10x)$ to one side and $10$ to the other side.

$\endgroup$

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Not the answer you're looking for? Browse other questions tagged or ask your own question.