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3xx(8)/(7)=?," "4xx(7)/(5)=?...

`3xx(8)/(7)=?," "4xx(7)/(5)=?`

Text Solution

Verified by Experts

The correct Answer is:
`(28)/(5)`
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Using appropriate properties find : (2)/(5) xx ((-3)/(7)) - (1)/(6) xx (3)/(2) + (1)/(14) xx (2)/(5) = (2)/(5) xx ((-3)/(7)) + (1)/(14) xx (2)/(5) - (1)/(cancel6) xx (cancel 3)/(2) = (2)/(5) xx ((-3)/(7) + (1)/(14) ) - (1)/(4) = (2)/(5) xx ((-6+1)/(14))- (1)/(4) = (cancel 2)/(cancel 5) xx (-cancel 5)/(cancel14) - (1)/(4) = (-1)/(7) - (1)/(4) (- 4 - 7)/(28) = (-11)/(28)

Is (-15)xx[(-7)+(-1)]=(-15)xx(-7)+(-15)xx(-1) ?