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Without graphing, can you use the slope to determine whether there is a solution for a system of two linear equations in two unknowns? How?

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Solution Summary

It explains how to use the slope to determine whether there is a solution for a system of two linear equations in two unknowns.

Solution Preview

Yes, you can determine whether there is a solution for a system of two linear equations using slopes.

To have one and only one solution (or unique solution), their slopes cannot be equal to each other.

for example:
x + ...

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