1) 6х+8х-7х=714 ; 7х=714; х=714:7; х=102; /////
2) 23х-19х+5х=1827; 9х=1827; х=1827:9; х=203;
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3)11х-6х+17=2042; 5х=2042-17; х=2025:5; х=405; ///
4) 5х+3х-47=6401; 8х=6401+47; х=6448:8; х=806
1плюс 99, 2 пл 98, 3 пл 97 и.т.д.
-11 5|8
-11 3|7
-12 8|9
-12 6|7
-13 49/3