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)
a. h + 3.5 = 18
b.h + 7 = 18
c.h + (h – 3.5) = 18
d.h + (h + 3.5) = 18