Systems of equations can be solved by graphing or by using substitution or elimination. What are the pros and cons of each method? Which method do you like best? Why? What circumstances would cause you to use a different method?

Question

Systems of equations can be solved by graphing or by using substitution or elimination. What are the pros and cons of each method? Which method do you like best? Why? What circumstances would cause you to use a different method? 
I can answer all them except the 1st one i need help with that one please

bobpursley · Answer

Pro and con of each method: graphing: fast, but inaccurate substitution: can involve tricky fractions elmination: fast, takes a little longer.