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b) (7•9-b•5)-9:3=20
c)60-10:( 37- 4 •x)=50
d)20•10•30•40•a=0
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Răspuns :

Dianageorgiana794ask

Răspuns:

b) (7•9-b•5)-9:3=20

(63-5b)-3=20

63-5b=20+3

5b=63-23

b=40:5=>b=8

c)60-10:( 37- 4 •x)=50

10:(37-4x)=60-50

37-4x=10:10

4x=37-1

x=36:4=>x=9

d)20•10•30•40•a=0

240000a=0

a=0:240000

a=0

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