A package of pens contains one red pen and five black pens. if 20 black pens are purchased, how many red pens are purchased?

4 red pens

Step-by-step explanation:

the ratio is 1:5, red to black, divide 20 by 5 to find the number of red pens.

there is no question content here, but you for the free points! : d

given the equation is 8+9z=-6, the first step would be to subtract the 8 from both sides:

8+9z-8=-6-8

since 8 minus 8 = 0, this would cancel out the 8. and since -6 minus 8 equals -14, the equation would look like this

9z = -14