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63+12x<15
12x<-48 (subtract 63 from both sides)
x<-4 (divide out the 12)

X > -4

63 + 12x < 15
1st. We will subtract 63 on both sides, to leave 12x on one side by itself:
63 - (63) + 12x < 15 - (63) =
12x < -48

2nd: Then we divided by 12 on both sides to isolate x, or to leave x by itself.
12x /12 < -48 /12=
x>-4

*Remeber, make sure to switch the signs from less than x to greater than x. We do that because we are either dividing or multiplying by a negative number!

The answer to your question is d 68%