Solve (8x+9)(5-x)=31x+94: Distributive Property Application

Question

Solve the equation using the distributive property:

(8x+9)(5x)=31x+94 (8x+9)(5-x)=31x+94

Video Solution

Step-by-Step Solution

To solve the equation (8x+9)(5x)=31x+94 (8x+9)(5-x) = 31x + 94 , we will use the distributive property. The steps are as follows:

  • Step 1: Apply the distributive property to the left-hand side.
    We do this by multiplying each term in the first binomial by each term in the second one:
  • (8x+9)(5x)=8x5+8x(x)+95+9(x)(8x + 9)(5 - x) = 8x \cdot 5 + 8x \cdot (-x) + 9 \cdot 5 + 9 \cdot (-x).
  • Simplify the terms:
    8x5=40x8x \cdot 5 = 40x,
    8x(x)=8x28x \cdot (-x) = -8x^2,
    95=459 \cdot 5 = 45,
    9(x)=9x9 \cdot (-x) = -9x.
  • Combine all like terms:
    The left-hand side becomes 8x2+40x+459x=8x2+31x+45-8x^2 + 40x + 45 - 9x = -8x^2 + 31x + 45.
  • Step 2: Compare both sides of the equation:
    We have 8x2+31x+45-8x^2 + 31x + 45 on the left-hand side and 31x+9431x + 94 on the right.
  • Step 3: Set the equation:
    8x2+31x+45=31x+94-8x^2 + 31x + 45 = 31x + 94.
  • Step 4: Subtract 31x31x from both sides:
    8x2+45=94-8x^2 + 45 = 94.
  • Step 5: Now subtract 45 from both sides:
    8x2=49-8x^2 = 49.
  • Step 6: Divide by 8-8:
    x2=498x^2 = -\frac{49}{8}.
  • Step 7: Evaluate the Result:
    The result x2=498x^2 = -\frac{49}{8} implies taking the square root of a negative number, which results in an imaginary number, thus indicating no real solution exists.

Therefore, the solution to the equation is: There is no solution to the equation.

Answer

There is no solution to the equation.