Application problems of the first series of equations in elementary school (solving process) Class 1 of Grade 7 first arranged 35 people to clean up, 15 people to pull the grass, and then 10 more people to support them. As a result, the number of cleaning people is twice that of pulling the grass. How many people are there to support cleaning and pulling the grass?

Suppose the number of people who support weeding is x, (35 + 15 + 10) △ 1 + 2) - x = 1560 △ 3 - x = 1520 - x = 15x = 5 (people) the number of people who support cleaning is 10 - 5 = 5 (people) the total number of people who support cleaning and weeding is 35 + 15 + 10 = 60 (people) the number of people who support weeding is 60

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5. How to calculate 46 × 52 + 53 × 52 + 52 simply
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