3,5-3x=23+x - 3x - х = 23 - 3,5 - 4x = 19,5 4x = - 19,5 x = - 19,5 : 4 x = - 4,875 ПРОВЕРКА 3,5-3(- 4,875) =23+(-4,875) 3,5 - (- 14,625) = 18,125 3,5 + 14,625 = 18,125 18,125 = 18,125
3,5 - 3x = 23 + x 3.5 - 23 = x + 3x 4x = - 19,5 x = - 19.5 /4 x = - 4,875
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