Bytelearn - cat image with glassesAI tutor

Welcome to Bytelearn!

Let’s check out your problem:

Solve the following for `x`\newline2(2x+1)=7x2^{(2x+1)}=7^{x}

Full solution

Q. Solve the following for `x`\newline2(2x+1)=7x2^{(2x+1)}=7^{x}
  1. Write Equation: To solve the equation 22x+1=7x2^{2x+1} = 7^{x}, we need to find a way to compare the exponents of the same base or use logarithms to solve for xx. First, let's write down the equation: 22x+1=7x2^{2x+1} = 7^{x}
  2. Apply Logarithms: Since the bases are different and there is no simple way to write them with a common base, we will use logarithms to solve for xx. We can take the natural logarithm (ln) of both sides of the equation to utilize the property that ln(ab)=bln(a)\ln(a^b) = b\cdot\ln(a).\newlineTaking the natural logarithm of both sides gives us:\newlineln(22x+1)=ln(7x)\ln(2^{2x+1}) = \ln(7^{x})
  3. Use Logarithm Property: Using the property of logarithms that ln(ab)=bln(a)\ln(a^b) = b\cdot\ln(a), we can bring down the exponents in front of the logarithms:\newline(2x+1)ln(2)=xln(7)(2x+1)\cdot\ln(2) = x\cdot\ln(7)
  4. Linear Equation in xx: Now we have a linear equation in terms of xx. We can distribute ln(2)\ln(2) on the left side to separate the terms involving xx:2xln(2)+ln(2)=xln(7)2x\cdot\ln(2) + \ln(2) = x\cdot\ln(7)
  5. Factor Out xx: Next, we want to get all the terms involving xx on one side of the equation and constants on the other side. We can subtract xln(7)x\ln(7) from both sides to achieve this:\newline2xln(2)xln(7)=ln(2)2x\ln(2) - x\ln(7) = -\ln(2)
  6. Divide to Solve: Now we can factor out xx from the left side of the equation: x(2ln(2)ln(7))=ln(2)x*(2\ln(2) - \ln(7)) = -\ln(2)
  7. Calculate xx: To solve for xx, we divide both sides of the equation by (2ln(2)ln(7))(2\cdot\ln(2) - \ln(7)):x=ln(2)(2ln(2)ln(7))x = \frac{-\ln(2)}{(2\cdot\ln(2) - \ln(7))}
  8. Calculate x: To solve for x, we divide both sides of the equation by (2ln(2)ln(7))(2\ln(2) - \ln(7)):
    x=ln(2)/(2ln(2)ln(7))x = -\ln(2) / (2\ln(2) - \ln(7))Finally, we can calculate the value of x using a calculator:
    xln(2)/(2ln(2)ln(7))x \approx -\ln(2) / (2\ln(2) - \ln(7))

More problems from Add and subtract polynomials