Question 958965
A+B=16 Multiply this equation by3
3A+3B=48
3A+6B=60 Subtract from above.
-3B=-12 Divide each side by -3.
B=4 ANSWER 1: She answered 4 questions of type B.
A+B=16
A+4=16
A=12 ANSWER 2: She answered 12 type A questions.
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10A+15B=Score
10(12)+15(4)=Score
120+60=Score
180=Score ANSWER 3: Anna's score was 180.