A bag contains white marbles and yellow marbles, 54 in total. The number of white marbles is 6 less than 3 times the number of yellow marbles. How many white ma
Question
2 Answer

1. User Answers Tom304
let x be white marbles, y be yellow marbles
x+y=54…(1)
x=3y  6 …(2)
put (2) into (1)
(3y  6) + y = 54
4y = 60
y=15
put y=15 into (1)
x + 15=54
x=39
so y=15 x=39 
2. User Answers Phoca
Answer:
The number of white marbles 'x' is 39
Stepbystep explanation:
Given :
A bag contains white marbles and yellow marbles, 54 in total.
The number of white marbles is 6 less than 3 times the number of yellow marbles.
To Find : Number of White marbles
Solution :
Let number of white marbles be x
Let number of yellow marbles be y
Since we are given that there are 54 marbles in total.
⇒ x + y = 54 (A)
We are also given that the number of white marbles is 6 less than 3 times the number of yellow marbles.
⇒ x = 3y  6 (B)
Solving A and B using substitution method
Put value of x from (B) in (A)
⇒3y  6 + y = 54
⇒4y  6 = 54
⇒4y = 54+6
⇒4y = 60
⇒y = 60/4
⇒y = 15
Thus , number of yellow marbles 'y' is 15
To find number of white marbles put value of y in (B)
⇒ x = 3*(15)  6
⇒x = 45  6
⇒x = 39
Thus , The number of white marbles 'x' is 39