What is the most efficient first step to isolate the variable term on one side of this equation? -9x = -4x + 5

Subtract 5 from both sides.

Add 5 to both sides.

Subtract 9x from both sides.
pls help me
Add 4x to both sides.

Find the solutions for a triangle with a =16, c =12, and b = 63º

Adifferent website gives the cost for the first train as £56.88 and the second train as £20.11 with a £9.50 charge for cycle storage for the whole trip. how much would the journey cost you?

The position of a moving particle is given by the position function: f(t)=-9t-t^2-0.2t^3+0.1t^4 0 a. at what time does the particle reverse direction? b. when is the displacement positive? (round one decimal place and answer in interval notation) c. when is the displacement negative? (round one decimal place and answer in interval notation) d. when is the particle’s acceleration positive? (round one decimal place and answer in interval notation) e. when is the particle’s acceleration negative? (round one decimal place and answer in interval notation)