Question

23. Află termenul necunoscut:
9 x 7-a = 5 x 7
b + 10 x 3 = 8 x 8
91 - (c + 3 x 9) = 6 x 8
d - 7 x 8 = 9 x 4​

Answer 1

Răspuns:

9 x 7-a=5x 7

63-a=35

-a=35-63

-a=-28

b+10x3=8x8

b+30=64

b=64-30

b=34

91-(c+3x9)=6x8

91-(c+27)=48

c+27=48-91

c+27=-43

c=-43-27

c=-70

d-7x8=9x4

d-56=36

d=36+56

d=92