Can someone me with these problems? i'm in k12 and this assignment was in classkick, so if anyone already completed this and can , do. i also am going to be asking some more questions, if you can with those too. (will give brainliest.)

28

step-by-step explanation:

because that's the answer

step-by-step explanation:

the ratio of red paint to blue paint is always 9/7. that means that, whatever x's value, (4x+12)/(4x-4) has that same ratio. so, set up an equation and cross-multiply to solve for x:

9/7 = (4x+12)/(4x-4)

9(4x-4) = 7(4x+12)

36x - 36 = 28x + 84

8x - 36 = 84

8x = 120

x = 15