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2. − 2 x − 7 = − 4 x.
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6. AC ABCD , 30 45. .
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7. AOB AB 6. OAB 60. .
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9. , 900 , 10- . 1000 . ?
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2. − 8 x −3=− 6 x.
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6. BD ABCD , 50 85. .
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9. , 800 , 5- . 1000 . ?
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