Answer:
10 yellow marbles
Step-by-step explanation:
(y is the amount of yellow marbles)
y=2x-2
y=2(6)-2
y=12-2
y=10
Sarah has 9 green marbles and 7 yellow marbles
Represent the green marble with x, and the yellow marble with y
So, we have:
x + y = 16
y = x - 2
Substitute y = x - 2 in x + y = 16
x + x- 2 = 16
Add 2 to both sides
2x = 18
Divide both sides by 2
x = 9
Substitute x = 9 in y = x - 2
y = 9 - 2
y = 7
Hence, Sarah has 9 green marbles and 7 yellow marbles
Read more about linear equations at:
https://brainly.com/question/14323743
