Х*7=700:10; 420-с=120*3

Question

Х*7=700:10; 420-с=120*3

Answer 1

Х*7=700:10
х*7=70
х=70:7
Х=10

10*7=700:10
             10=10

Comments

420-с=120*3

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420-с=360

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с=420-360

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с=60

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420-60=120*3

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Огромное спасибо!!!