Question

Practice Problem - Solve the equation 3x = 2x + 5.

1.What can you do to isolate the variable on one side of the equation?
a. Add 5 negative unit tiles to both sides. b.Add 5 positive unit tiles to both sides.
c. Add 2 negative x-tiles to both sides. d. Add 2 positive x-tiles to both sides.

Answer 1

c

Explanation:

You have 3x=2x+5. To isolate the variable you need to subtract 2x (or add -2x) so you get x=5.