Solve this equation 2(7y-1)=40

y=3

Step-by-step explanation:

Let's solve your equation step-by-step.

2(7y−1)=40

Step 1: Simplify both sides of the equation.

2(7y−1)=40

(2)(7y)+(2)(−1)=40(Distribute)

14y+−2=40

14y−2=40

Step 2: Add 2 to both sides.

14y−2+2=40+2

14y=42

Step 3: Divide both sides by 14.

y=3

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