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Автор - LAL1213

Срочно помогите!
Очень нужно быстро решить!
Решите уравнения
А) (x+2)+x=9
Б)x+(7+x)=11

Ответ

Автор - Анастасия12345670
А) (х+2)+х=9
    х+2+х=9
    2х=7
    х=3,5
Б) х+(7+х)=11
    х+7+х=11
    2х=4
    х=2
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