Math
posted by Tami
Sanjay takes a preap multiple choice test of 25 questions in which he earns 10 points for every correct answer, but loses 2 points for every incorrect answer. Sanjay answered all 25 questions and scored 202 points. How many did he answer correctly? how many did he answer incorrectly?

PsyDAG
R = 25  W
10R  2W = 202
Substitute 25W for R in the second equation and solve for W. Insert that value into the first equation to solve for R. Check by putting both values into the second equation.
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