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There are 180 peach trees and pear trees in the orchard. It is known that the number of peach trees is just four times that of pear trees. How many of the two kinds of fruit trees are there? If the first condition in the above question is changed to "there are 108 more peach trees than pear trees planted in the orchard", how to solve the equation?
Set X pear trees and 4x peach trees
x+4x=180
5x=180
X = 36
4 * 36 = 144 for peach trees
Supplementary answer:
4x-x=108
3x=108
x=36
4 * 36 = 144 for peach trees
The fifth grade of primary school
A trapezoid has the same upper bottom and height. When the lower bottom is increased by 3 decimeters, the area increases by 27 decimeters. What is the height of the trapezoid? (use equation solution)
If the height is set to x, then the
3X=27×2
3X=54
X=54÷3
X=18
A: the height of this trapezoid is 18 decimeters
Bonus big, remember to use formula, not equation
A fruit shop sells 95 baskets on the first day, 45 baskets on the second day, and the remaining quarter on the third day. At this time, there are still two fifths of the total. How many fruits does the fruit shop have
（95+45）÷【1-2/5÷（1-1/4）】
=140÷【1-8/15】
=140÷7/15
=300 baskets
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