Решите уравнения :           / - это черта дроби только когда будет делить пишите :   ок ?  7/9x + 4 = 2/3x +8   ;    1/2x + 1/6x = x-3    ;       5.1- 8x = 3.3 - 10x    ;       0.7 * (2-3y) = -7
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