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Elina [12.6K]
3 years ago
14

Which rational number must be added to3\7to get -3\4 ?

Mathematics
1 answer:
VladimirAG [237]3 years ago
3 0
\frac{3}{7}+x=-\frac{3}{4}\\\\\frac{3}{7}(\frac{4}{4})+x=-\frac{3}{4}(\frac{7}{7})\\\\\frac{12}{28}+x=-\frac{21}{28}\\\\x=-\frac{21}{28}-\frac{12}{28}\\\\x=-\frac{33}{28}=1\ \frac{5}{28}
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