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log₃⁽²ˣ⁺¹⁾=log₃⁽ˣ⁻²⁾+1
log₃⁽²ˣ⁺¹⁾=log₃⁽ˣ⁻²⁾+log₃³
log₃⁽²ˣ⁺¹⁾=log₃⁽⁽ˣ⁻²⁾³⁾
2x+1=(x-2).3
2x+1=3x-6
6+1=3x-2x
7=x
Rpta: 7