Solve for each variable in the following equations. be sure to check any or all solutions to see if they are true for the given equation.
1) 5/y(^2)-9 = 3/y+3 - 2/y-3
2) 2x/4x-1 + x/4x+1 = 1/16x(^2)-1 + 1/2
3) 3/2m - 6/2m+m(^2) = 1/m+2
4) 2/y+2 - 6/y(^2)+5y+6 = 5/(y+2)(^2)

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.)