If one tree is planted on both sides of a road every 3 m, there are still three trees left. If only one tree is planted every 2.5 m, there are 77 trees missing. How long is the road Solve by equation

If one tree is planted on both sides of a road every 3 m, there are still three trees left. If only one tree is planted every 2.5 m, there are 77 trees missing. How long is the road Solve by equation

The road is x meters long
(x/3+1)+3=(x/2.5+1)-77
X = 1200 m

Trees are planted on both sides of the road. One tree is planted every 3M, one tree is left, one tree is planted every 2.5m, and 75 trees are missing. How long is the road?
Equation of first degree with one variable!

I didn't notice either of them. It's trees on both sides of the tree
Let X be the number
Then 3 [(x-1) △ 2-1] = 2.5 [(x + 75) △ 2-1]
The solution is x = 383
Then the road length is 3 [(x-1) △ 2-1] = 570 meters