Question

A bag contains yellow Marbles and blue marbles 37 and total the number of yellow marbles is 8 less than 2 times the number of blue marbles how many yellow marbles are there

Answer 1

22 yellow marbles

Explanation:

Let y = yellow marbles

B = blue marbles

y+b = 37

y =2b-8

Substitute this equation into the first equation

2b-8 + b =37

Combine like terms

3b-8 =37

Add 8 to each side

3b-8+8 =37+8

3b = 45

Divide by 3

3b/3 = 45/3

b = 15

We need to know yellow marbles

y =2b-8

y = 2(15) -8

y = 30-8

y =22