Let x be the number of miles Karly biked Dory biked 11 times as many miles as Karly, therefor, Dory = 11x The total number of miles back by both is 156
The equation will be:
11x + x = 156
Before we can get the number of miles Dory biked, we must first get the number of miles Karly biked represented by x.
Get the x
12x = 156 12x/12 = 156/12 x = 13
Karly = x = 13 miles biked Dory = 11x = 11(13) = 143 miles biked
To check: 11x + x = 156 11(13) + 13 = 156 143 + 13 = 156 156 = 156
