Question

A bag contains green marbles and red marbles, 47 in total. The number of green marbles is 5 more than 2 times the number of red marbles. How many green marbles are there?

Answer 1

There are a total of 32 Green marbles

Explanation:

Let R represent the number of red marbles

Let G repersent the number of green marbles

Write down what is given

G+R=47

Write down what G can also be

G=2R+5

Substitute:

2R+5+R=47

Combine like terms (Algebra)

3R+5=47

Subtract 5 from both sides

3R=42

Simplify

R=14

Substitute the value of R in the equation for G

G=2(14)+5

Solve/Algebra

G=28+5

Solve/Algebra

G=32