Write Equation: To solve the equation 22x+1=7x, we need to find a way to compare the exponents of the same base or use logarithms to solve for x. First, let's write down the equation: 22x+1=7x
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 x. We can take the natural logarithm (ln) of both sides of the equation to utilize the property that ln(ab)=b⋅ln(a).Taking the natural logarithm of both sides gives us:ln(22x+1)=ln(7x)
Use Logarithm Property: Using the property of logarithms that ln(ab)=b⋅ln(a), we can bring down the exponents in front of the logarithms:(2x+1)⋅ln(2)=x⋅ln(7)
Linear Equation in x: Now we have a linear equation in terms of x. We can distribute ln(2) on the left side to separate the terms involving x:2x⋅ln(2)+ln(2)=x⋅ln(7)
Factor Out x: Next, we want to get all the terms involving x on one side of the equation and constants on the other side. We can subtract xln(7) from both sides to achieve this:2xln(2)−xln(7)=−ln(2)
Divide to Solve: Now we can factor out x from the left side of the equation: x∗(2ln(2)−ln(7))=−ln(2)
Calculate x: To solve for x, we divide both sides of the equation by (2⋅ln(2)−ln(7)):x=(2⋅ln(2)−ln(7))−ln(2)
Calculate x: To solve for x, we divide both sides of the equation by (2ln(2)−ln(7)): x=−ln(2)/(2ln(2)−ln(7))Finally, we can calculate the value of x using a calculator: x≈−ln(2)/(2ln(2)−ln(7))