12 - ( 3r + 2 ) = - 7 ( r + 6 )

r = -13

Step-by-step explanation:

Step 1: distribute the signs & terms outside the parenthesis. on the left side, distribute a - sign (same thing as -1) and on the right side distibute -7

12 - (3r) - (+2) = (-7)r + (-7)6

Step 2: algebraically simplify

10 - 3r = -7r - 42

52 = -4r

r = -13

answer:

step-by-step explanation:

here, the total dishes = 10

dishes having meat = 3 ( chicken, meatloaf and hamburger )

thus, the probability of having meat on the chosen dishes = number of dishes having meat / total dishes

=

therefore, the probability of not having meat = 1- the probability of having meat on the chosen dishes

=

=

=

⇒ option b is correct.