Me solve this equation 4x - 9 = 7x + 12

2. using calculations based on a perpetual inventory system, determine the inventory balance altira would report in its august 31, 2021, balance sheet and the cost of goods sold it would report in its august 2021 income statement using the average cost method. (round "average cost per unit" to 2 decimal places.)

Ithink i know it but i want to be sure so can you me out ?

Tatiana reads 40 pages of her book every night for x number of nights. write an expression that shows the number of pages she has read