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How to do interesting math on page 34 of the fifth grade winter vacation paradise?
Suppose the first number is x, the second number is y, the third number is z, and the fourth number is C.

Then x+4=Y-4=z*4=c/4.

Y=x+8

Z=(x+4)/4

c=(x+4)*4

X+Y+Z+C= 100

X+(X+8)+(X+4)/4+(X+4)* 4 = 100

X= 12, so Y = 20, Z = 4 and C = 64.

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