Question 605177
If f(x)=2x+3, g(x)=1-2x, and 3f(a)=g(3a), then a= 
I know it is -2/3 but I don't understand how? 
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f(a) = 2a + 3
3f(a) = 6a + 9
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g(3a) = 1 - 6a
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6a + 9 = 1 - 6a
12a = -8
a = -2/3