Ответ:
4x + -7y = 7
4x + -7y + 7y = 7 + 7y
: -7y + 7y = 0
4x + 0 = 7 + 7y
4x = 7 + 7y
x = 1.75 + 1.75y
Объяснение:
4х-7х3=7
4х-21=7
4х=21+7
4х=28
х=28:4
х=7
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Ответ:
4x + -7y = 7
4x + -7y = 7
4x + -7y + 7y = 7 + 7y
: -7y + 7y = 0
4x + 0 = 7 + 7y
4x = 7 + 7y
x = 1.75 + 1.75y
x = 1.75 + 1.75y
Объяснение:
Ответ:
4х-7х3=7
4х-21=7
4х=21+7
4х=28
х=28:4
х=7