1 Answer

Karthick M · Answer 1 · 2023-10-28T14:02:42+0000

We have that

When a number doesn't have a sign we just suppose that it is a plus. For example,

$\begin{gathered} 70=+70 \\ 3x=+3x \end{gathered}$

Therefore,

$78x+(20x)\rightarrow78x+(+20x)$

Remember that if we multiply equal sings, we get a plus. Thus,

$\begin{gathered} 78x+(+20x)\rightarrow78x+20x\rightarrow98x \\ \text{The answer is}\colon \\ 98x \end{gathered}$

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