Comparative amounts

Question

sarah And Lisa scored a combine total of 48 points if the number of points scored by Sarah is 12 points less than 3 times the number of points scored by Lisa then how many points did each girl score

Answer 1

Lets use the variable S to represent Sarah and the variable L to represent Lisa.

The first sentence tells us that Sarah and Lisa scored a combine total of 48 points, so that means that S+L=48.

Now let’s figure out the value for each variable.

The question tells us that number of points scored by Sarah is 12 points less than 3 times the number of points scored by Lisa. This means that the value of S is 3L-12 and the value of L is L.

Now substitute these values into the original equation of S+L=48. So the equation is:

3L-12+L=48

4L=60

L=15

S+15=48

S=33

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