Ответ:
8x^2+12x+2x+3-8x^2=17-5x
12x+2x+3=17-5x
14x+5x+3=17
14x+5x=17-3
19x=14
x=14/19
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Ответ:
8x^2+12x+2x+3-8x^2=17-5x
12x+2x+3=17-5x
14x+5x+3=17
14x+5x=17-3
19x=14
x=14/19