Помогите .................

Question

Помогите .................

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Answer 1

72x=720

x=720/72

x=10

y/1=870

y=870*1

y=870

96z=960

z=960/96

z=10

850/x=850

x=850/850

x=1

Answer 2

72*x=720 y:1=870 z*96=960
x=720:72 y=870 z=960:96
x=10 z=10


850:x=850
x=850:850
x=1