(08.05) mindy wants to solve the following system using the elimination method: y = x − 4 y = 2x − 3 what number should the equation y = x − 4 be multiplied by to eliminate x? −1 −2 −4 −6

b). 4320 have a nice day

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