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afla valoarea lui x : 200 - (x-20)=120
(x:2) x4=100
10x +60 =900


Răspuns :

200-(x-20)=120
x-20=200-120
x-20=80
x=80+20
x=100

(x:2)x4=100
x:2=100:4
x:2=25
x=25·4
x=100

10x+60=900
10x=900-60
10x=40
x=40/10
x=4
200-(x-20)=120 x-20=200-120 x-20=80 x=80+20 x=100 (x:2)x4=100 x:2=100:4 x:2=25 x=25·4 x=100 10x+60=900 10x=900-60 10x=40 x=40/10 x=4 Sper ca te-am ajutat ))):