matt has 50 marbles, 6 more red than blue, 4 fewer green than blue, how many blue marbles does he have?

Question

Matt has 50 red blue and green marbles.  he has 6 more red than blue and 4 fewer green than blue.  How any blue marbles does Matt have?

Answer 1

Let x = the number of blue marbles

Let x + 6 = the number of red marbles

Let x - 4 = the number of green marbles

x + x + 6 + x - 4 = 50

3x + 2 = 50

3x = 48

x = 16 blue marbles