Given that (-4,2) is on the graph of f(x),find the corresponding point for the function -1/2f(x)

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Let f(x) = x+3 and g(x) = 1/x the graph of (fog)(x) is shown below what is the range of (fog)(x)?

Two times a number plus three times another number equals 4. three times the first number plus four times the other number is 7. find the numbers