ShaydaT496439 ShaydaT496439
  • 30-10-2022
  • Mathematics
contestada

Solve 81x = 27x + 2.( the x and the x+2 are exponents)

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CylasN629364 CylasN629364
  • 30-10-2022

Solution

Solve the equation below;

[tex]81^x=27^{x+2}[/tex]

Step 1: Apply exponent rules

[tex]\begin{gathered} 81^x=27^{x+2} \\ 3^{4x}=3^{3\left(x+2\right)} \end{gathered}[/tex]

Step 2: solve for the value of x

[tex]\begin{gathered} 3^{4x}=3^{3\left(x+2\right)} \\ 4x=3\left(x+2\right) \\ 4x=3x+6 \\ 4x-3x=6 \\ x=6 \end{gathered}[/tex]

Therefore the value of x = 6

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