Question

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Answer 1

Let the no. be n

(a) (n+5) × 3 = 3(n+5) = 3n + 15

(b) (n-7) ÷ 2 = n -7/2

(c) (n-2) ÷ 5 = n-2/5

(d) (n-9)

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Answer 2

Answer:

a. (n + 2) × 5

b. (n - 3) ÷ 2

Step-by-step explanation:

a) Let the number that adrian thinks be n

he add 2 to the number, therefore we will add 2 to n, i.e. n + 2

then he multiply the sum with 5, therefore we will multiply the sum, i.e. n + 2 with 5 so we will get (n + 2) × 5 or

$5(n + 2)$

b) Let the number that adrian thinks be n

he subtracts 3 from the number, therefore we will subtract 3 from n, i.e. n - 3

then he divide the difference by 2, therefore we will divide n - 3 by 2 so we will get (n - 3) ÷ 2 or

$\frac{n - 3 }{2}$

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