Вопрос школьника по предмету Математика
Помогите решить уравнение
2×(х-9)+5×(3-х)=3
Ответ учителя по предмету Математика
2 × (x — 9) + 5 × (3 — x) = 3
2x — 18 + 15 — 5x = 3
2x — 5x = 18 — 15 + 3
-3x = 6
x = 6 ÷ (-3)
x = -2
Ответ: x = -2.
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