Question

Q17. From the sum of 2m – n + 11 and – n – 11 subtract m – n – 9.​

Answer 1

Answer:

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From the sum of 2m – n + 11 and – n – 11 subtract m – n – 9.

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✿Here the simple concept of Addition and subtraction of Algebra & integer is used.

✿First we will add 2m – n + 11 and -n – 11 and then subtract m -n -9.

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Addition

$\sf{ \implies2m -n +11 +(-n) -11} \\\sf{\implies2m -2n +0 }\\ \sf{\implies \: 2m -2n }$

Subtraction

$\sf{ \implies2m -2n - ( m -n -9)} \\ \sf{ \implies2m -2n -m +n +9} \\ \sf{ \implies \: m -n +9}$

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Answer 2

Step-by-step explanation:

✿Here the simple concept of Addition and subtraction of Algebra & integer is used.

✿First we will add 2m – n + 11 and -n – 11 and then subtract m -n -9.

Solution

Addition

⟹2m−n+11+(−n)−11

⟹2m−2n+0

⟹2m−2n

Subtraction

⟹2m−2n−(m−n−9)

⟹2m−2n−m+n+9

⟹m−n+9