ПОМОГИТЕ ПОЖАЛУЙСТА РЕШИТЬ УРАВНЕНИЯ .
1. 3,1 ( 1-3 t ) + t = 0.4 ( t - 14 )
2. -5 ( х - 7) = 30 - ( 2 х + 1 )
3. 0,8 ( 0,5 - 2 х ) =2 х + 0,4 .
ВСЁ.
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