Y-3=-5/3(x-8)
Y-3= -5/3x + 13 1/3
Y = -5/3x + 13 1/3 + 3
Y = -5/3 + 16 1/3
I believe 2 2/3 quarts of the mixture. Cheers!
Look up online "equation calculator" and it should be the first one to appear, "Symbolab" supper easy way to help you with problems!