Robin can clean
72
7272 rooms in
6
66 days.
how many rooms can robin clean in
9
99 days?

45 rooms

Step-by-step explanation:

well divide 72 rooms by 6 days to find rooms per day then multiply it by 9 to get __ rooms.

72/6 = 8 x 9 = 45

8 rooms per day

5

step-by-step explanation:

5=812a+9+3

step 1: simplify both sides of the equation.

5=812a+9+3

5=(812a)+(9+3)(combine like terms)

5=812a+12

5=812a+12

step 2: flip the equation.

812a+12=5

step 3: subtract 12 from both sides.

812a+12−12=5−12

812a=−7

step 4: divide both sides by 812.

812a /812 = -7/812

a= -1/116

so the answer is

a=   -1/116