Your answer would be 1.13 repeating or no solution.
X+y=10
y=x-6
x + (x-6) = 10
2× - 6 = 10
2× = 4
x=2
(2, -4)
1. You turn all mixed numbers into improper fractions
2. Multiply the numerators
3. Multiply the denominator’s
4. Reduce the final answer and convert back to mixed numbers if needed
You would start by finding the total amount of marbles, which in this case is 20.
Then find the total amount of blue AND green balls. 10.
Then put 10/20, simplify, and you have yourself 1/2.