Indicate which property is illustrated in step 6.

a). subtraction property of equality

b). simplification

c). division property of equality

d). addition property of equality

Option A.

Step-by-step explanation:

If we have an expression as ( a+b ) = c

Then as per subtraction property of equality [(a+b) - b = c - b]

In this question step 6 is 18 + 5 - 5 = 21 - 5

If we compare step 6 with the statement above then we find ( 18 + 5 ) - 5 = 21 - 5

Therefore, option A subtraction property of equality will be the answer.

-22

times both sides by 2, times () by 8, add alile terms, move terms, add alike and caculate divide both sides by 3