A bag contains white marbles and green marbles, 62 in total. The number of white marbles is 3 less than 4 times the number of green marbles. How many white marbles are there?

There are 49 white marbles.

Step-by-step explanation:

w + g = 62 (w = white and g = green marbles).

w = 4g - 3

w - 4g = - 3 Subtract this equation from the first equation:

g - (-4g) = 62 - (-3)

5g = 65

g = 65/5 = 13.

So w = 62 - 13 = 49.