Question

Determine the solution set of -3x+7=10 or 3x-9=0.

a.{-1}
b.{3}
c.the solution set is null
d.{-1,3}

Answer 1

To find the solution set, we need to solve each equation separately and then combine the solutions.

For the first equation, -3x + 7 = 10:
Subtracting 7 from both sides, we have -3x = 3.
Dividing both sides by -3, we get x = -1.

For the second equation, 3x - 9 = 0:
Adding 9 to both sides, we have 3x = 9.
Dividing both sides by 3, we get x = 3.

Therefore, the solution set is { -1, 3 }, so the answer is (d).