You will be marked brainlest

D im 100% sure please mark me brainliest

Step-by-step explanation:

x = 0

Step-by-step explanation:

that's all know so its either A or D

I think its D

Hope I helped u

i think the correct option is the second option.

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 -