Brainliest to first:)

its b

Step-by-step explanation:

B) r=1

Step-by-step explanation:

First you have to isolate the variable by getting the r variables on one side and the numbers on the other. So, add 1 to 11 like:

6r-1+6r=11

    +1      +1

6r + 6r = 12 is the new equation. Combine like terms:

12r=12

Divide both sides by 12 and get r=1.

Hope this helps :)

(f - g)(x) = 5x^3 - 3

step-by-step explanation:

rearrange these functions vertically, with like terms in separate columns:

f(x) = 5x^3 - 2

g(x) =         +1

now subtract, column by column:

(f - g)(x) = 5x^3 - 3

-2x + 7 = 7

subtract 7 from both sides.

-2x = 0

divide both sides by -2.

x = 0