Предмет: Алгебра, автор: dimassik112

Помогите Решите систему
уравнения методом подстановки
y=-2.5
5x+4y=75 с подробным решением

Ответы

Автор ответа: EvilNintendo

0

вместо y подставляем -2,5, тем самым умножаем 4 на (-2,5)
5x+4*(-2,5) - 75= 0
5x-10-75=0
5x-85=0
5x=85
x=17

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