Question

A bag contains white marbles and green marbles, 64 in total. The number of white marbles is 4 less than 3 times the number of green marbles. How many white marbles are there?

Answer 1

NOTE THIS IS AN EXAMPLE:

Explanation:

Let W = # white marbles and Y = # yellow marbles

W + Y = 44

W = 3Y - 8

W - 3Y = -8

Subtract

4Y = 52

Y = 13

W =31