Answer:
I help u after my online class
<span>x=number of brown shoes
2x=number of black shoes (twice as many black shoes as brown shoes)
so x+2x=66
add like terms 3x=66
solve for x by dividing 3; x=22
so there are 22 brown shoes and 44 black shoes (2 x 22= 44)</span>
Answer: Choose option B. (The full answer is 10a + 7)
Step-by-step explanation:
Add the numbers
a + 5 + 9a + 2
a + 7 + 9a
Combine like terms
a + 7 + 9a
10a + 7
Yes it is
since the painter can paint half a room in half a day, they can paint a full room in a full day
7 rooms for 7 days maintains the 1 to 1 ratio