Question

afla numerele necunoscute;x×30=7;420÷x=60;7×y=490;y×8=432;z+250=900;825-z=600;

Answer 1

x=30/7

x=4,2

x=420/60

x=7

y=490/7

y=60

y=432/8

y=54

z=900-250

z=650

z=825-600

z=125

Answer 2

X x 30=7    X=30/7

420:x=60            x=420:60=7

7xy=490              y=490:7=70

yx8=432              y=432:8=54

z+250=900              z=900-250=650

825-z=600         825-600=z         z=225