SOLUTION: Find the value of "a" if a line containing the point (a,-3a) has a y-intercept of 7 and a slope of -2/3. I used the slope formula to set it up: -2/3=(-3a-7)/a but got stu

Question 472009: Find the value of "a" if a line containing the point (a,-3a) has a y-intercept of 7 and a slope of -2/3.
I used the slope formula to set it up:
-2/3=(-3a-7)/a
but got stuck. Help please
Answer by stanbon(75887) (Show Source): You can put this solution on YOUR website!
Find the value of "a" if a line containing the point (a,-3a) has a y-intercept of 7 and a slope of -2/3.
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y = (-2/3)x + 7
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-3a = (-2/3)a + 7
-9a = -2a + 21
7a = -21
a = -3
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Cheers,
Stan H.
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