Ответы на вопрос:
1) 15-4(d+3) = -17 15-4d+12 = -17 4d = 15+12+17 4d = 44 d = 44/4 d = 11 2) c-24 = 2c-18 -24+18 = 2c-c c = -6 3) 3(n-3)+22 = 28 3n-9+22 = 28 3n = 28-22+9 3n = 15 n = 15/3 n = 5 4) 0.1x+1.2 = 2.3 0.1x = 2.3-1.2 0.1x = 1.1 x = 1.1/0.1 x = 11 5) -8x-8 = 34-x -8-34 = 8x-x 7x = -42 x = -42/7 x = -6
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