13x-9=5x+19
13x-5x=19+9
8x=28
x=3.5
13x-5x=19+9; 8x=28; x=28/8=7/2=3,5. Ответ: x=3,5.
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13x-9=5x+19
13x-5x=19+9
8x=28
x=3.5
13x-5x=19+9; 8x=28; x=28/8=7/2=3,5. Ответ: x=3,5.