Final answer:
None of the given options satisfy the equation.
Step-by-step explanation:
To determine which set of values for x₁, x₂, x₃, and x₄ satisfy the equation 4x₁+6x₂-x₃+7x₄=84, we can substitute each set of values into the equation and check if the equation holds true.
Let's substitute the values from option D into the equation:
4(4) + 6(5) - 3(3) + 7(6) = 16 + 30 - 9 + 42 = 79 ≠ 84
Since the equation does not hold true for option D, we can conclude that none of the given options satisfy the equation