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If $a\equiv 18\pmod{42}$ and $b\equiv 73\pmod{42}$, then for what integer $n$ in the set $\{100,101,102,\ldots,140,141\}$ is it true that $$a-b\equiv n\pmod{42}~?$$

 Apr 24, 2019
 #1
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Sorry, same for this one.

 Apr 25, 2019
 #2
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If $a\equiv 18\pmod{42}$ and $b\equiv 73\pmod{42}$, then for what integer $n$ in the set $\{100,101,102,\ldots,140,141\}$ is it true that $$a-b\equiv n\pmod{42}~?$$

 

see: https://web2.0calc.com/questions/help-please_11406#r2

 

laugh

 Apr 25, 2019

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