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v) [5000 - (23 x a-14) x 9]: 100 = 14
w)(500 - 14) 10:[680 - (635 - a)] x 5 = 405 fara fractii va rog!​


Răspuns :

Răspuns:

[5.000-(23xa-14)x9]:100=14

[5.000-(23xa-14)x9]=14x100

5.000-(23xa-14)x9=1.400

(23xa-14)x9=5.000-1.400

(23xa-14)x9=3.600

23xa-14=3.600:9

23xa-14=400

23xa=400+14

23xa=414

a=414:23

a=18

(500 - 14)× 10:[680 - (635 - a)] x 5 = 405

486x10:[680 -( 635 -a)]=405 :5

4860:[680- (635-a)]= 81

680-(635-a) =4860:81

680-(635-a) = 60

635-a=680-60

635-a= 620

a=635-620

a=15