SOLUTION: Raul found that by increasing his speed by 5 km/h, he could drive 12 km in 0.2 hours. what was Raul's original speed

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Question 1053283: Raul found that by increasing his speed by 5 km/h, he could drive 12 km in 0.2 hours. what was Raul's original speed
Answer by josmiceli(19441) About Me  (Show Source):
You can put this solution on YOUR website!
+d+=+r%2At+
Let +s+ = his actual speed
given:
+12+=+%28+s+%2B+5+%29%2A.2+
+12+=+.2s+%2B+1+
+.2s+=+11+
+s+=+55+
Raul's original speed was 55 km/hr