Question

minus 3 by 7 + 5 by 4​

Answer 1

-3/7+5/4

= (-12+35)/28

=23/28

Answer 2

Answer:

$\frac{ - 3}{7} + \frac{5}{4} \\ \\ = \frac{ - 3 \times 4}{7 \times 4} + \frac{5 \times 7}{4 \times 7} \\ \\ = \frac{ - 12 + 35}{28} \\ \\ = \frac{23}{28}$