1.

What number should be added to2/3 to get -1 /7​

Answer»

\huge\underline\mathcal\color{blue}{AnSWeR}

LET the NUMBER to be ADDED be x

\large\red{\frac{2}{3} + x = \frac{ - 1}{7} }

\large\red{x = \frac{ - 1}{7} - \frac{2}{3}}

Taking L.C.M

\large\red{x = \frac{ - 1 \times 3}{7 \times 3} - \frac{2 \times 7}{3 \times 7}}

\large\red{x = \frac{ - 3}{21} - \frac{14}{21}}

\large\red{x = \frac{ - 3 + 14}{21}}

\large\red{x = \frac{11}{21}}


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