Students solve word problems. They received 3 points for each correctly solved task. Four points were deducted for a task that was not solved or incorrectly solved. Tomas solved a total of 15 tasks and scored 24 points. How many tasks did he solve correctly? What percentage was successful?

Correct answer:

x =  12
p =  80 %

Step-by-step explanation:

3x-4(15-x) = 24

3•x-4•(15-x) = 24

7x = 84

x = 12

Our simple equation calculator calculates it.
p=100 x15=100 1215=80%

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