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Heeelp

If 2+a is divisible by 11 and 35-b is divisible by 11 prove that a+b is divisible by 11 too

User WisdomPill
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1 Answer

3 votes

Answer: see below

Step-by-step explanation

Let 2 + a = 11 x

Let 35 - b = 11 y

Where x and y are any unknown integer

subtract the two equations

- 33 + a + b = 11 (x+y)

a+ b = 11 (x+ y) +33

a+ b = 11 (x+y) + 3 (11)

a+ b = 11(x+ y+3)

Which proves that a+b is a factor of 11

User Cdalto
by
8.3k points

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