Bytelearn - cat image with glassesAI tutor

Welcome to Bytelearn!

Let’s check out your problem:

Find the positive solution of the equation.

2x^((6)/(7))+28=156
Answer:

Find the positive solution of the equation.\newline2x67+28=156 2 x^{\frac{6}{7}}+28=156 \newlineAnswer:

Full solution

Q. Find the positive solution of the equation.\newline2x67+28=156 2 x^{\frac{6}{7}}+28=156 \newlineAnswer:
  1. Isolate x term: First, we need to isolate the term with the variable xx on one side of the equation. To do this, we subtract 2828 from both sides of the equation.\newline2x(6/7)+2828=156282x^{(6/7)} + 28 - 28 = 156 - 28
  2. Simplify right side: Now we simplify the right side of the equation by performing the subtraction.\newline2x67=156282x^{\frac{6}{7}} = 156 - 28\newline2x67=1282x^{\frac{6}{7}} = 128
  3. Divide by 22: Next, we divide both sides of the equation by 22 to solve for x67x^{\frac{6}{7}}. \newline2x672=1282\frac{2x^{\frac{6}{7}}}{2} = \frac{128}{2}\newlinex67=64x^{\frac{6}{7}} = 64
  4. Recognize power of 22: We recognize that 6464 is a power of 22. Specifically, 6464 is 22 raised to the 66th power (262^6). This will help us solve for xx.\newlinex67=26x^{\frac{6}{7}} = 2^6
  5. Raise to reciprocal: To solve for xx, we need to raise both sides of the equation to the reciprocal of the fraction 67\frac{6}{7}, which is 76\frac{7}{6}.(x67)76=(26)76(x^{\frac{6}{7}})^{\frac{7}{6}} = (2^6)^{\frac{7}{6}}
  6. Multiply exponents: When we raise a power to a power, we multiply the exponents. In this case, (67)×(76)=1(\frac{6}{7}) \times (\frac{7}{6}) = 1, so the left side simplifies to xx. On the right side, we multiply the exponents: 6×(76)=76 \times (\frac{7}{6}) = 7.x=27x = 2^7
  7. Calculate value: Now we calculate 272^7 to find the value of xx.\newline27=1282^7 = 128

More problems from Operations with rational exponents