There are 108 pear trees and apple trees in the orchard. The number of pear trees is three times that of apple trees. How many apple trees are there

There are 108 pear trees and apple trees in the orchard. The number of pear trees is three times that of apple trees. How many apple trees are there

There are x apple trees
x+3x=108
4x=108
x=27

There are 42 fewer pear trees than apple trees in the orchard, and apple trees are three times as many as pear trees. How many apple trees and pear trees are there respectively? (equation)

If x is set for pear tree, 3x is set for apple tree
3X-X=42
2X=42
X=21
21 + 42 = 63 (trees)
A: there are 63 apple trees and 21 pear trees
For reference only: - D

The apple trees in the orchard are 4 / 5 of the pear trees. There are 40 more pear trees than the apple trees. How many apple trees and pear trees are there? (solution to the equation) I'm worried!

Suppose there are 4x apple trees and 5x pear trees
5x-4x=40
That is: x = 40
So there are: 4x40 = 160 apple trees
Pear trees: 160 + 40 = 200

There are 384 pear trees and apple trees in the orchard, of which there are 9 rows of pear trees and 21 trees in each row. How many apple trees are there in the orchard? The solution of the equation

Suppose there are x apple trees
x+9x21=384
x =384-189
x =195

There are 42 fewer pear trees than apples in the orchard. The number of apples is 3 buds of pear trees. How many apple trees and pear trees are there?

There are x pear trees and 3x apple trees
3x-x=42
2x=42
x=42÷2
x=21
3 × 21 = 63
A: there are 21 pear trees and 63 apple trees

There are 420 trees in the orchard, of which 20% are pear trees and 1 / 6 are apple trees. How many are pear trees and apple trees?
Formula calculation!

Pears. 420 * 0.2 = 84
Apple. 420 * 1 / 6 = 70
84 + 70 = 154

There are 42 fewer pear trees than apple trees in the orchard. The number of apple trees is three times that of pear trees. How many are apple trees and pear trees

Equation: suppose there are x pear trees, then
There are 3x apple trees
3x-x=42
2x=42
x=21
3x=63
A: there are 21 pear trees,
There are 63 apple trees

There are 48 apple trees and pear trees in the orchard. The number of apple trees is 15 times that of pear trees. How many pear trees are there? (solved by equation)

Suppose there are x pear trees. From the equation of number of pear trees + number of apple trees = 48, x + 15x = 48 & nbsp; 65x = 48 & nbsp; & nbsp; & nbsp; X = 40. A: there are 40 pear trees

There are 1800 fruit trees in the orchard. The pear tree is twice as big as the apple tree, and the peach tree is three times as big as the apple tree?

Apple: pear: Peach = 1:2:3
1800÷（1+2+3）=300
Apple tree: 300 × 1 = 300
Pear tree: 300 × 2 = 600
Peach tree: 300 × 3 = 900

There are 450 peach trees, pear trees and apple trees in the orchard. Peach trees account for 1 / 3 of them. The ratio of pear trees to apple trees is 3:2. How many of the three kinds of fruit trees are there? (I've worked them out. I'm not sure. Please check them for me.)
3 + 2 = 5 peach tree: 450 × 1 / 3 = 150 pear tree: 450 ／ 5 × 3 = 270 apple tree: 45 ／ 5 × 2 = 180

Primary school topics
Wrong
Why do you say you are wrong? Peach 150 Li 270 Apple 180 then the total is 450. So, you are not uncertain. You can immediately know that you are wrong after checking
Tao: 450 ÷ 3 = 150. This is very simple. The title has already told you
Well, we know that 150 of 450 are peaches. That is to say, the sum of pears and apples should be 450-150 = 300, right? Because there are 450 peaches in total, 150. So the sum of the other two kinds is 300
So you can see. Just like you just did:
3+2=5
300 △ 5 × 2 = 120 (apple tree)
300 △ 5 × 3 = 180 (pear tree)
Plus 150 (peach tree)
The sum of three is 450. Look again. Have you found out what's wrong
Come on, math is very important