The answer is 42 in each pile
I first found x using the second equation :
-2x+4y=15
-2x = -4y+15
x =2y-7.5
Then, I substituted this value into the OTHER equation :
2x+5y=7
2(2y-7.5)+5y=7
4y-15+5y=7
9y=22
y=2.444
So you have you y value. Now, input this value into any one of the other equations (it doesn't matter which) to find x.
-2x+4y=15
-2x+4(2.444)=15
-2x+9.776=15
-2x=5.224
x=-2.612.
So the solution for this system of functions is (-2.612, 2.444).
If Tran uses 15 drops of red paint and than multiply by the number of yellow paint for every drop of red paint.
15 x 8 = 120
So Tran would need to use 120 drops of yellow paint for 15 drops of red paint.
