first pic
first step is using distributive property
answer
B. distributive property
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2nd pic
1/2(x + 6) = 18
x + 6 = 36
x = 30
answer
D. x = 30
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3rd pic
last step to find x = 10 is division property of equality
answer
D. division property of equality
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4th pic
step 2
5x - 35 = 55
+ 35 +35
answer
B. addition property of equality
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last pic
7x + 42 = 42
-42 = - 42
7x = 0
answer is B.
subtraction property of equality
