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jekonya1
@jekonya1
July 2022
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при каком значении x значение выражения 9(13-0.8x) на 6.7 меньше,чем выражение 7.1x-5?
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nuscha2015
9(13 - 0.8x) + 6.7 = 7.1x - 5
117 - 7.2x + 6.7 - 7.1x = -5
- 14.3x = - 5 - 123.7
- 14.3x = - 128.7
x = - 128.7 : (-14.3) = - 1287 : (-143)
x = 9
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Answers & Comments
117 - 7.2x + 6.7 - 7.1x = -5
- 14.3x = - 5 - 123.7
- 14.3x = - 128.7
x = - 128.7 : (-14.3) = - 1287 : (-143)
x = 9