Răspuns :

Coco81id

Răspuns:

1. (a+5):5=14

(a+5)=14x5

(a+5)=70

a=70-5

a=65

2.(a-5)x5=35

(a-5)=35:5

(a-5)=7

a=5+7

a=12

3.(a-90):9=83

(a-90)=83x9

(a-90)=747

a=747+90

a=837

4. 90:(a-8)=9

(a-8) =90:9

(a-8)=10

a=10+8

a=18

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