1. (30-x)·x-(30-x+10)(x-6)=32
2. (2x-10)(x+8)-2x·x=220
3. 3(25-x)-2(25+x)=5
4. 2(10+x)+3·10=54
5. 2x= \frac{7}{4} (x+10)
2. (2x-10)(x+8)-2x·x=220
3. 3(25-x)-2(25+x)=5
4. 2(10+x)+3·10=54
5. 2x= \frac{7}{4} (x+10)
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