Question

D=vit + at
solve for vi

Answer 1

`\large\boxed{vi=(d-at)/(t)}`

Explanation:

`d=vit+at\qquad\text{subtract}\ at\ \text{from both sides}\\\\d-at=vit+at-at\\\\d-at=vit\qquad\text{divide obth sides by}\ t\\\\(d-at)/(t)=(vit)/(t)\\\\(d-at)/(t)=vi`