Incorrectly 7484

Tomáš was given the task of solving 10 problems. He received 3 points for each correctly solved, and 4 points were deducted for each incorrectly solved. He scored a total of 9 points. How many tasks did he solve correctly, and how many incorrectly or not at all?

Correct answer:

a =  7
b =  3

Step-by-step explanation:

9=3a4(10a)  9=3 a4 (10a)  7a=49  a=749=7  a=7
b=10a=3



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