Write the expression for the the statement "add $5 x$ and $3 x$ , then subtract the so obtained sum from $12 y$ ”. $[3 M a r k s]$

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Solution

"Add $5 x$ and $3 x$ " is algebraically written as $5 x + 3 x$ . $[1 M a r k]$

Now, "subtract the so obtained sum from $12 y$ " is algebraically written as $12 y - (5 x + 3 x)$ . i.e., $12 y - 5 x - 3 x$ . $[1 M a r k]$

Note that $5 x$ and $3 x$ are like terms. Hence the expression becomes $12 y - 8 x$ . $[1 M a r k]$

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