Краткое пояснение: Решаем уравнения, чтобы найти значения аргумента.
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f(x) = 1 - 10x = 0
1 - 10x = 0
-10x = -1
x = -1 / -10
x = 0.1
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f(x) = 1 - 10x = -5
1 - 10x = -5
-10x = -5 - 1
-10x = -6
x = -6 / -10
x = 0.6
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f(x) = x/5 - 3 = -1
x/5 - 3 = -1
x/5 = -1 + 3
x/5 = 2
x = 2 * 5
x = 10
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f(x) = x/5 - 3 = 7
x/5 - 3 = 7
x/5 = 7 + 3
x/5 = 10
x = 10 * 5
x = 50
Ответ: x = 0.1, x = 0.6, x = 10, x = 50