SOLUTION: The Mackenzie River is 1183 km longer than the St Lawrence River. The sum of their lengths is 7299 km. How long is each river?

Question 1137768: The Mackenzie River is 1183 km longer than the St Lawrence River. The sum of their lengths is 7299 km. How long is each river?

Answer by MathLover1(20849) (Show Source): You can put this solution on YOUR website!

let the Mackenzie River length be and the St Lawrence River length be
The Mackenzie River is longer than the St Lawrence River.
....eq.1
The sum of their lengths is

........substitute from eq.1

now go to eq.1

....eq.1, substitute

so, the Mackenzie River is long, and the St Lawrence River is long

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