Răspuns :

Răspuns:

d) 5y=18

y=18÷5

y=3.6

5×3.6=18

g) 9x-1=0

9x=1

x=1:9

x=0.(1)

h) 4x-20=0

4x=20

x=20:4

x=5

4×5-20=20-20=0

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