Question

( frac{2+left(frac{-5}{6}right)+left(frac{9}{10}right)+left(frac{5}{7}right)}{frac{2}{5}-frac{5}{6}+frac{9}{10}+frac{5}{7}} )
( =frac{2 times 42-5 times 35+9 times 21+5 times 3}{210} )
( =frac{84-175+189+15}{210} )
( =frac{113}{120} )
( 2 cdot frac{-21}{51} times frac{3}{7} times frac{35}{164} times frac{-41}{93} )
( =-1 times frac{1}{7} times frac{3}{2} times-frac{1}{3} )
( -frac{1}{14} )
( 3(1) x=frac{14}{15} )
( (11) x=frac{-15}{17} )
( (-x)=-left(-frac{14}{19}right) quad-(-x)=-left(-left(-frac{15}{17}right)right) )
( =frac{14}{15}=x quad-frac{15}{17}=x )
( (-(-x))=x quad therefore(-(-x))=x )

# Summer Holiday Homework 2019 Class VIII Maths Q1. Solve + 7) + ( )+ 3 Q3. Verify that :-(- x) = x for (i). x= 14 02. Find xxx (ii) x = 15

Solution