Ответ:
9x-9.9=-3.2 +8x-5
9x-9.9=8x-8.2
9x-8x=-8.2+9.9
x=1.7
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Ответ:
9x-9.9=-3.2 +8x-5
9x-9.9=8x-8.2
9x-8x=-8.2+9.9
x=1.7