Multiply the ten by two to make both of the bottoms twenty. Then mutiply 2x - 4 by 2 to get 4x - 8 cancel out the bottoms then you have

then subtract 2x from both sides and then add eight for both sides then you have 2x=8 then divide both sides by 2 and you have x=4
So lawn and gardens will be 55 for one square yard and yard depot will be 80.
lawn and gardens costs 5 more for each cubic yard
80- 55 to get the difference in costs
25 is the difference
25/5
5 extra yards will be needed
proof:
lawn and garden = l
yard depot = y
l=30x +30
y=25x+55
30(5) +30
150+30
180
25(5) + 55
125 + 55
180
No u have to use subtraction for subtracting problems
13 and 14, cuz then you get 1 and 2 and these are less than 3
The correct answer would be 6x^5-8x^3-8x