Condensing logarithmic expression in exercise, use the properties of logarithms to rewrite the expression as the logarithm of a single quantity. see example 4.
4 in(x - 6) - 1/2in(3x + 1)

Isabelle is mixing red and blue paint to make purple paint she adds 3/10 of a fluid ounce of red to 12/25 of a fluid ounce of blue to make 1 1/30 fluid ounces of purple how many fluid ounces of red paint ounces of red paint will she need to make 3 fluid ounces of purple paint