(4,-2) and (2,-8) lie on the line Ax-2By = 28. What is the value of A?


4,-2) and (2,-8) lie on the line Ax-2By = 28. What is the value of A?
Put the points in. First one.
A+B=7 call this equation 1)
second point:
A+8B=14 call this equation 2)

Now you have two equations...
Now solve for A and B by any number of methods.

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