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Which equation represents this situation? Naila worked 3.5 hours more than Lisa. Together, they worked a total of 18 hours. Lisa worked h hours. (Points : 4)

Ah + 3.5 = 18

b.h + 7 = 18

c.h + (h – 3.5) = 18

d.h + (h + 3.5) = 18