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Cristi are cateva baloane rosii si de 4ori mai multe baloane albastre.Cate baloane de fiecare fel are cristi,daca in total are 20 de baloane?   va multumesc

Răspuns :

x+4x=20
5x=20
x=4 baloane rosii
4X4=16 baloane albastre
16+4=20

Cristi = x baloane rosii + X x 4 baloane albastre
x baloane rosii + X x 4 baloane albastre = 20
x + 4x =20
5x = 20
x = 20 : 5
x = 4
4 baloane rosii
4 x 4 =16 baloane albastre