A-349=651 y*90=720 z:8=80 Реши уравнения помогите

Question

A-349=651 y*90=720 z:8=80
Реши уравнения



помогите

Answer 1

1-3........................................

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Answer 2

А-349=651
А= 651+349
А= 1000

У*90=720
У=720/90
У=8

Z/8=80
Z=80*8
Z=640