Question

solve this
$\frac{3}{7} + ( \frac{ - 6}{5}) + ( \frac{ - 8}{35} ) + \frac{1}{21}$
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Answer 1

Answer:

$\frac{3}{7} +\frac{-6}{5}$

Lcm of 7 and 5 = 35

$\frac{3}{7} *\frac{5}{5} =\frac{15}{35}$

$\frac{-6}{5} *\frac{7}{7} =\frac{-42}{35}$

$\frac{15 + (-42)}{35} = \frac {-27}{35}$

$\frac{-27}{35} +\frac{-8}{35} =\frac{-35}{35}$

$\frac{-35}{35} + \frac{1}{21}$

lcm of 35,21 = 105

$\frac{-35}{35} *\frac{3}{3} =\frac{-105}{105}$

$\frac{1}{21} *\frac{5}{5} = \frac{5}{105}$

$\frac{-105+5}{105} =\frac{-100}{105}$

we will simplify it

$\frac{-20}{21}$ is the correct answer