800 points then lost 400 points whats the final score

What should be done to solve the equation? x+14=21 add 14 to both sides of the equation. subtract 14 from the left side of the equation. add 14 to the left side and subtract 14 from the right side of the equation. subtract 14 from both sides of the equation.

James was playing a game with his friends. he won 35 points. then he lost 15, lost 40 and won 55. how did he come out

What additional information could be used to prove abc =mqr using sas? check all that apply.