If a/12 + a/15 = 18 and 18/b + 24/b = 6,then a/b * (b/a÷a/b) is what?
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Step-by-step explanation:
a/12 + a/15 = 18
15a + 12a = 18
28a = 18
a = 18/28
a = 9/14
18/b + 24/b = 6
18 + 24/b = 6
42 = 6b
b = 42/6
b = 7
a/b×(b/a÷
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