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luvlafin
luvlafin asks:
Q:

the total length of two rivers is 12,875km if the longer river were 261 km shorter then it would be as long as the shorter river find the lenth for ea

In Topics: Helping my child with math
> 60 days ago

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Answers (1)

laurenf
laurenf writes:
Hi luvlafin,

Ok, so let's call the distance of each of the rivers "X". The shorter river is length X, while the longer river is X +261. We know the total of the 2 rivers is 12,875 so we can set up our equation like this:

X + (X + 261) = 12,875

If we subtract 261 from each side, we get this equation:

X + X = 12,614

Combining X's we get:

2X = 12,614

And if we divide both sides by 2 to get the X by itself we get:

X = 6,307

So our shorter river is 6,307 km and our longer river is 6,307 + 261 = 6,568 km.

I'm not exactly sure what grade level this is, but I've linked some pre-algebra word problems below which are similar and could help. Good luck!

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