He turned to the first test on . The symbols looked like a secret code. He remembered his teacher saying that variables were just placeholders for the unknown. He took a deep breath and began.
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Finally, he reached the linear equations . One problem asked him to find . It felt like a puzzle. He moved the to the other side, divided by , and there it was: He turned to the first test on
The next page was a battlefield of addition and subtraction. He had to simplify reshenie testov matematika algebra 7 klass grishina i v