Ответ на вопрос
1) \(8(6x-7)-17x = 48x-56-17x = 31x-56\).
2) \(9y-5(17-y) = 9y-85+5y = 14y-85\).
3) \(0,6(4x-3)+2,1(x-5) = 2,4x-1,8+2,1x-10,5 = 4,5x-12,3\).
4) \(2,5(4a-8b)-(3a-4b)\cdot1,4 = 10a-20b-4,2a+5,6b = 5,8a-14,4b\).
5) \(-(-5,2-3,1c)-(2,4c-6,4) = 5,2+3,1c-2,4c+6,4 = 0,7c+11,6\).
6) \(\displaystyle \frac{9}{16}\Big(5\frac{1}{3}x-\frac{2}{3}y\Big)-\frac{7}{20}\Big(2\frac{6}{7}x-5\frac{5}{7}y\Big)\)
\(=\frac{9}{16}\Big(\frac{16}{3}x-\frac{2}{3}y\Big)-\frac{7}{20}\Big(\frac{20}{7}x-\frac{40}{7}y\Big)\)
\(=3x-\frac{3}{8}y-x+2y=2x+\frac{13}{8}y\).
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