# Math Help - Use Algebra to solve

1. ## Use Algebra to solve

Use Algebra to solve $v_2$ = $v_1$ + $at$ for $v_1$ if $v_2$ = 245m/s, a= 19m/s squared, and t = 22s

I just want to be put on the right track... now I seen many examples for this online. I just am primiarily confused because of the units of time and speed.

2. ## Re: Use Algebra to solve

In solving for $v_1$, you can ignore the units. Units are useful to check that expressions that you are evaluating make physical sense, but they don't contribute to the numerical answer.

Start by subtracting $at$ from both sides of the equation.

3. ## Re: Use Algebra to solve

Thank you very much. I figured it out and it was right, I made it harder than it should of been.