Вопрос школьника по предмету Математика
4x+5(3x-2x)=5-11x помогите
Ответ учителя по предмету Математика
4х + 15х — 10х = 5 — 11х
4х + 5х + 11х = 5
20х = 5
х = 5/20
х = 1/4 или 0,25
Ответ: 0,25
Можно так:
4х + 5х = 5 — 11х (т.к. 3х-2х= х)
9х + 11х = 5
20х = 5
х = 1/4 или 0,25
Впрочем, ответы совпали, так что должно быть всё верно.
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