# graphing, using substitution, or elimination

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1. Systems of equations can be solved by graphing, using substitution, or elimination. What are the pros and cons of each method?

2. What is the difference between intersecting and perpendicular lines? Can two lines exist that are not intersecting or parallel? Explain your answer.

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#### Solution Preview

1. Graphing allows one to see what is going on. However, it can be difficult to determine exactly where two lines intersect. Also, if two lines have similar slopes, it may appear that they are parallel when they really are not. So, I do not think graphing is a good method for solving ...

#### Solution Summary

This solution offers the pros and cons associated with these methods: graphing, using substitution, or elimination.

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