What is the solution to the equation k + 4 = 7?
k = 3
k = 2 1/4
k = 2 3/4
k = 3 1/4

k = 3.

Step-by-step explanation:

k + 4 = 7  Add -4 to both sides:

k + 4 - 4 = 7 - 4

k = 3.

5/12, or 5: 12

step-by-step explanation:

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