Question

verify -(x+y)=(-x)+(-y)when x =-3/4,y=-6/7​

Answer 1

Answer:

$- (x + y) = ( - x) + ( - y) \\ - ( \frac{ - 3}{4} - \frac{6}{7} ) = ( \frac{3}{4} ) + ( \frac{6}{7} ) \\ - ( \frac{ - 21 - 24}{28} ) = ( \frac{21 + 24}{28} ) \\ \frac{21 + 24}{28} = \frac{21 + 24}{28} \\ \frac{45}{28} = \frac{45}{28}$

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Answer 2

Step-by-step explanation:

$lhs \\ - (x + y) \\ = - ( - \frac{3}{4} + ( - \frac{6}{7} )) \\ = - ( - \frac{3}{4} - \frac{6}{7} ) \\ = - ( \frac{ - 21 - 24}{28} ) \\ = - ( \frac{ - 45}{28} ) \\ = \frac{45}{28}$

$rhs \\ ( - x) + ( - y) \\ = ( - ( - \frac{3}{4} )) + ( - ( - \frac{6}{7} )) \\ = \frac{3}{4} + \frac{6}{7} \\ = \frac{21 + 24}{28} \\ = \frac{45}{28}$

LHS =RHS

Proved

Your another question

$- \frac{21 + 24}{28} \\ = - \frac{45}{28}$

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