book Maths Puzzle Numerical Ability

I need help in graphing the following equation: 2y+20=0

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book Other Question

use a unit multiplyer to convert 11 inches to centimeters.(1in. = 2..54cm.) {the answers are..........2.794cm., 27.94cm., 4.33cm., or none of these} three more than five times a number is less than 18. Find the largest integer for which this is true.