The amount left in the fund decreases by $110 for each desk purchased.
We suspect that each new desk probably costs $110.
3/5 = 12/20
2/4 = 10/20
Since 12 is greater than 10, Vinny ate more
We have the equation:

Fist we add the b on the right side of the equation.

For the second step we multiply d to the right side of the equation
I think it might be expression one =14 i think and number 2 is obviously is 19 but you would put parenthesis around 5+4_2+6
I think i did this right its been a while since i did this