For x- 1 5and y- 3 7- verify that x-y - -x - -y -

x=15 and y=37 ⇒ (x+y)=( x)+( y) ⇒ (15+37)=( 15)+( 37) ⇒ (7+1535)= 15 37 ⇒ 2235= 2235 LHS=RHS ...

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Byju's Answer

Standard VIII

Mathematics

Addition and Subtraction of Algebraic Expression

For x= 1 5a...

Question

For $x = \frac{1}{5}$ and $y = \frac{3}{7}$ , verify that $(x + y) = (- x) + (- y) .$

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Solution

$x = \frac{1}{5}$ and $y = \frac{3}{7}$

$\Rightarrow$ $- (x + y) = (- x) + (- y)$

$\Rightarrow$ $- (\frac{1}{5} + \frac{3}{7}) = (- \frac{1}{5}) + (- \frac{3}{7})$

$\Rightarrow$ $- (\frac{7 + 15}{35}) = - \frac{1}{5} - \frac{3}{7}$

$\Rightarrow$ $- \frac{22}{35} = - \frac{22}{35}$

$L H S = R H S$

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For x=15and y=37, verify that (x+y)=(−x)+(−y).

x=15 and y=37⇒−(x+y)=(−x)+(−y)⇒−(15+37)=(−15)+(−37)⇒−(7+1535)=−15−37⇒−2235=−2235LHS=RHS

For $x = \frac{1}{5}$ and $y = \frac{3}{7}$ , verify that $(x + y) = (- x) + (- y) .$