Umm I don’t understand this question

Step-by-step explanation:

Hey there!!

Given,

We generally divide the fraction from smallest prime number if they are divisible and make it in a simplest form.

So, let's work with it.

Divide it by 2.

=

See, it's again divisible by 2, so again divide it by 2.

=

Now, here 6 can be divided by 2, 3 but 7 can't be divided, as it is a prime number.

So, the answer is option D.

Hope it helps...

see explanation

step-by-step explanation:

a

(6r + 7) + (13 + 7r) ( remove brackets and collect like terms )

= 6r + 7 + 13 + 7r

= 13r + 20

b

remove brackets and collect like terms

13 - r - 1 + r

= 12 - r

c

remove brackets and collect like terms

= - 8 - r + 2r - 4

= - 12 + r

d

remove brackets and collect like terms

= 7r - - - 6r

[-   - = - - = - ]

= r -