Question

75-x=75 4+x=64 решить уравнения 89-y=0

Answer 1

75-х=75

х=75-75

х=0

4+х=64

х=64-4

х=60

89-у=0

у=89-0

у=89

Answer 2

$x=75-75$

$x=0$

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$75-0=75$ (это проверка)

$75=75$

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$4+x=64$

$x=64-4$

$x=60$

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$4+60=64$ (это проверка)

$64=64$

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$89-y=0$

$y=89$

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$89-89=0$ (это проверка)

$0=0$