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Mathematics 20 Online
OpenStudy (anonymous):

prove that if x = 40, then x - 7 ≅ 13. in a indirect proof

OpenStudy (anonymous):

Is this modular arithmetic? If so, you need to specify the mod.

OpenStudy (mathmath333):

\(\large\tt \begin{align} \color{black}{\text{is it this ,if x=40,then }~x-7\neq13}\end{align}\)

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