Asked by Claire

Lisa and Katie are playing a card game, and a total of 900 points has been scored. Lisa scored 150 more points than Katie. If you let l= the number of points that Lisa scored, and k= the number of points that Katie scored, then the problem can be represented by the system:
l+k=900 and l=k+150
Graph the system. How many points did each of them score?
Answered by PsyDAG
Cannot graph here. I will use substitution.

l = k + 150

l + k = 900

Substitute k+150 for l in the second equation and solve for k. Insert that value into the first equation to solve for l. Check by putting both values into the second equation.

Answered by Yuo
250
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