Shawna found out there are 4 yellow pencils for every blue pencil. write an equation for this situation. complete the table to show how many yellow pencils if there are 5,7, 9,11 or 13 blue pencils.

5--20yellow pencils

7-- 28 yellow pencils

9-- 32 yellow pencils

11- 44 yellow pencils

13-52 yellow pencils

Step-by-step explanation:

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5=812a+9+3

step 1: simplify both sides of the equation.

5=812a+9+3

5=(812a)+(9+3)(combine like terms)

5=812a+12

5=812a+12

step 2: flip the equation.

812a+12=5

step 3: subtract 12 from both sides.

812a+12−12=5−12

812a=−7

step 4: divide both sides by 812.

812a /812 = -7/812

a= -1/116

so the answer is

a=   -1/116