Question

Each marble bag sold by Ann's Marble Company contains 3 purple marbles for every 4 yellow marbles. If a bag has 36 yellow marbles, how many purple marbles does it contain?

Answer 1

3/4 = x / 36....3 purple to 4 yellow = x purple to 36 yellow
cross multiply
4x = 108
x = 108/4
x = 27....there are 27 purple marbles

Answer 2

Sorry but do you know The two lines graphed below are not parallel. How many solutions are there to the system of equations?