Which equation have the same value of * as 3/5 (30*-15) = 72 check all that apply

18x-15=72

50*-25=72

18*-9=72

3 (6*-3) = 72

18*=81

18*=63

*=3.5

*=4.5

What is 3/9 + 3/4 + 3/2=

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