Ответ №1
243=3⁵
1/81=1/3⁴=3⁻⁴
27=3³
3⁵ * 3⁻⁴*⁽³ˣ⁻²⁾ = 3³*⁽ˣ⁺³⁾
3⁵⁺⁽⁻¹²ˣ⁺⁸⁾ = 3³ˣ⁺⁹
3¹³⁻¹²ˣ = 3³ˣ⁺⁹
13-12x=3x+9
15x=4
x=4/15
Ответ №1
243=3⁵
1/81=1/3⁴=3⁻⁴
27=3³
3⁵ * 3⁻⁴*⁽³ˣ⁻²⁾ = 3³*⁽ˣ⁺³⁾
3⁵⁺⁽⁻¹²ˣ⁺⁸⁾ = 3³ˣ⁺⁹
3¹³⁻¹²ˣ = 3³ˣ⁺⁹
13-12x=3x+9
15x=4
x=4/15
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