Question

4/7+(-4/7)+3/7+(13/9)

Answer 1

$\frac{4}{7} + \frac{ - 4}{7} + \frac{3}{7} + \frac{13}{9}$
LCM of denominators=63

$\frac{(4 \times 9) + ( -4 \times 9) + (3 \times 9) +( 13 \times 7) }{63 }$
$\frac{36 + ( - 36) + 27 + 91}{63}$
$\frac{36 - 36 + 27 + 91}{63}$
$\frac{27 + 91}{63}$
$\frac{117}{63}$
$\frac{13}{7}$