Francis did this work to solve an equation. did he make an error?

If private savings 'v' = 0.75s and total savings 's' equals $4.20 billion, solve for public and private savings.

Pls never taught i’m really confused and i rlly need

If the car had not hit the fence, how much farther would it have skidded? solve the skid-distance formula to find the extra distance that the car would have traveled if it had not hit the fence. round your answer to two decimal places. note that unit conversion is built into the skid distance formula, so no unit conversions are needed.