Step 1 - Distributive Property: -5x - x + 15 = -6x + 15 = -3(2x) - 3(-5)
Step 2 - Combine Like Terms: -6x + 15 = -6x + 15
Step 3 - How many solutions: There is one solution because the variables and constants on both sides of the equation can be simplified to be equal to each other.
Step 4 - Why is there that many solution: There is one solution because the equation simplifies to a statement that is true for a particular value of x.