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This is a basic one but I encountered this and was wondering how it makes sense.

\begin{align} 2x + 3y & = 9 &&\text{Rearrange into the form y=mx+c :} \tag 1\\ 3y & = 9 - 2x && \text{} \tag 2\\ y & = \frac{9}{3} -\frac{2}{3}x & && \text{} y & = \frac{-2}{3}x + 3 && \text{} \tag 1\\ \end{align}

Kartik Bhatia
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user827090
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1 Answers1

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Yes as long as while shifting we move along with the sign It is allowed .

Subtraction is not Commutative for example $a-b$ can not ne rearranged to $b-a$ but it can surely be written like $-b+a$ if we move the signs along.

Kartik Bhatia
  • 512