( x - 80 ) : 40 = 640

Question

( x - 80 ) : 40 = 640

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Comments

640*40=25600

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25600-80=25520

Answer 1

Если решить уравнение, то вот:
(Х-80):40=640
х:40-80:40=640
Х/40-2=640
Х/40=642
Х=642:40
Х=16.05

Comments

не правильно

Answer 2

40*x-80*40=640
40x-3200=640
40x=640+3200
40x=3840
x=3840/40
x=96

Comments

(х-80)/40=640

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х-80=640*40

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х-80=25600

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х=25600+80

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х=25680

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(25680-80)/40=640\

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640=640