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Mathermatics - Algebra - Linear Equations

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3. (i) What are the x-intercept and y-intercept of a linear equation?
(ii) What are their coordinates on a graph?
(iii) How can they be used to graph a line?
(iv) Demonstrate by determining the intercepts of "14x + 7y = 21".
4. Write a system of equations having
a. A unique solution.
b. An infinite number of solutions.
c. No solution.
How would each system appear graphically?

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