Mathematical application problem (Dehua 20 15 seventh grade senior high school entrance examination mathematics) - Training Enrollment Network

Mathematical application problem (Dehua 20 15 seventh grade senior high school entrance examination mathematics)

I. (1): 91-(x+x/2+1)

(2): Formula:

15x+35[9 1-(x+x/2+ 1)]+20(x/2+ 1)= 2070

15x+3 150-52.5 x+ 10x+20 = 2070

-27.5x=- 1 100

x=40

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