Add $- 42$ to the difference of $- 8$ and $- 68$

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Solution

First, find the difference of $- 8$ and $- 68$
$(- 8) - (- 68) = - 8 + 68 = 60 [∵ (-) (-) = (+)]$
Now, we have to add $- 42$
$60 + (- 42) = 60 - 42 = 18$
Hence, the result is $18$

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