Question

X:30=7. 420:×=60. 7×y=490. Y×8 =432 z+250 =900. 825-z=600.

Answer 1

x : 30 = 7

x = 7 × 30

x = 210

420 : x = 60

x = 420 : 60

x = 7

7 × y = 490

y = 490 : 7

y = 70

y × 8 = 432

y = 432 : 8

y = 54

z + 250 = 900

z = 900 - 250

z = 650

825 - z = 600

z = 825 - 600

z = 225

Answer 2

Explicație pas cu pas:

X:30=7

X=210

420:x=60

x=7

7y=490

y=70

8Y=432

Y=54

z+250=900

z=650

825-z=600

z=225