We read your photo as:

Multiply both sides of the equation by the denominator (11 - 7x).

Mathematics

ScanSolve AI Answer

Step-by-step solution

4 steps

To solve the equation x=8−3x11−7xx = \frac{8 - 3x}{11 - 7x}, we will first eliminate the fraction and then solve the resulting quadratic equation.

  1. Multiply both sides of the equation by the denominator (11−7x)(11 - 7x).

    x(11−7x)=8−3xx(11 - 7x) = 8 - 3x
  2. Expand the left side of the equation.

    11x−7x2=8−3x11x - 7x^2 = 8 - 3x
  3. Rearrange the terms to form a standard quadratic equation ax2+bx+c=0ax^2 + bx + c = 0.

    Move all terms to one side to set the equation to zero.

    0=7x2−11x−3x+80 = 7x^2 - 11x - 3x + 8 7x2−14x+8=07x^2 - 14x + 8 = 0
  4. Solve the quadratic equation using the quadratic formula x=−b±b2−4ac2ax = \frac{-b \pm \sqrt{b^2 - 4ac}}{2a}.

    For the equation 7x2−14x+8=07x^2 - 14x + 8 = 0, we have a=7a = 7, b=−14b = -14, and c=8c = 8.

    First, calculate the discriminant Δ=b2−4ac\Delta = b^2 - 4ac.

    Δ=(−14)2−4(7)(8)\Delta = (-14)^2 - 4(7)(8) Δ=196−224\Delta = 196 - 224 Δ=−28\Delta = -28

    Since the discriminant is negative, there are no real solutions. The solutions are complex numbers.

    x=−(−14)±−282(7)x = \frac{-(-14) \pm \sqrt{-28}}{2(7)} x=14±28i14x = \frac{14 \pm \sqrt{28}i}{14}

    We can simplify 28\sqrt{28} as 4×7=27\sqrt{4 \times 7} = 2\sqrt{7}.

    x=14±27i14x = \frac{14 \pm 2\sqrt{7}i}{14}

    Divide both terms in the numerator by 14.

    x=1414±27i14x = \frac{14}{14} \pm \frac{2\sqrt{7}i}{14} x=1±77ix = 1 \pm \frac{\sqrt{7}}{7}i

    The solutions for xx are:

    x=1+77i,x=1−77i\boxed{x = 1 + \frac{\sqrt{7}}{7}i, \quad x = 1 - \frac{\sqrt{7}}{7}i}
Was this helpful?

Still stuck on this one?

Ask a follow-up, and the answer starts from this question.

Got a different question?Ask your own question
Handwritten step-by-step solution preview

Handwritten Step-by-Step Solution

Get this as a handwritten image on WhatsApp — like a tutor wrote it for you.

Try on WhatsApp