Which expressions could complete this equation so that it has an infinite number of solutions?

9x -3(x +8)=

A. 6x - 24 <<<<<(I think this is one answer)

B. 6(x-3) +6C. 14 +5x -34D 8(x -3) - 2x

Christa buys 14 flowerpots. Some are small and cost $2.40 each. The rest are large and cost $5.60 each. She spends a total of $49.60. Which equation models this situation? Let s represent the number of small flowerpots she buys.

A. 5.6s + 2.4(s + 14) = 49.6

B. (2.4 + 9.6)(14 – s) = 49.6

C. 2.4s + 5.6(14 – s) = 49.6

D. 5.6s + 2.8(14) = 49.6

Mira has $760 in her bank account and withdraws $40 each month. Paulina has $210 in her bank account and deposits $70 each month. In how many months will Mira and Paulina have equal amounts of money in their accounts?

A. 5

B. 7

C. 8

D. 10