SOLUTION: A.Can you please give me an example of a system of equations that is more easily solved by substitution? B. Can you give me an example of a system of equations that is more easi

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Question 107814: A.Can you please give me an example of a system of equations that is more easily solved by substitution?
B. Can you give me an example of a system of equations that is more easily to solve by addition?
Answer by MathLover1(20850)   (Show Source): You can put this solution on YOUR website!
1.
Solve by adding:





If we add the two equations, we will get or .
If we divide both sides by , we get .
Next, we substitute in for into any of given equations.
If we choose to substitute in the first equation, we get… ==> ……==>… … ==>… .
So the two lines intersect at (, ).


2.
Solve a system by substitution
1st: Pick equation and solve for of the variables.




The second equation is already solved for .

"" is the expression needed.

2nd: Substitute this expression in the other equation.



3rd: Sovle.



Add to the both sides

……..divide both sides by




4th: Use this new value in the step equation to get the other variable.






5th: State the solution and include values for both variables.



So the two lines intersect at (,)


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