Indicate which property is illustrated in step 3.
step 1= 12 + 9x - 12 - 4x + 3 = 12 + (9x - 12) - 4x + 3
step 2 = 12 + (-12 + 9x) - 4x + 3
step 3 = [12 + (-12)] + (9x - 4x) + 3
step 4 = 0 + (9x - 4x) + 3
step 5 = (9x - 4x) + 3
step 6 = (9 - 4)x + 3
step 7 = 5x + 3

6 hours 48 min

step-by-step explanation:

68÷5=13.6

13.6×30=408min=6 hours 48 min.

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ruth is 6 years old

step-by-step explanation:

6 + 24 = 30,   so 6/30 = .2  

if you do 1/5 it also equals .2, so that is the answer.