Упростите выражение: а) 4 х – 6 х – 3 х + 7 + х б) – 8(у - 3) + 4(у - 2) – 2(3 у + 1) в) ⁵⁄₉ (3,6 а – 3 ³⁄₅ в) – 3,5( ⁴⁄₇ а – 0,2 в).
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б) -10х+14=0 х=14/10
а) =7 - 4x
б) = -8y+24+4y-8-6y-2 = 14 - 10y
в) = 5/9 * 3 и 3/5a - 5/9 * 3 и 3/5b - 3 и 1/2* 4/7a - 3 и 1/2 * 1/5b =
5/9 * 18/5a - 5/9 * 18/5b - 7/2 * 4/7a - 7/2 * 1/5b =
2a - 2b - 2a - 7/10b = -2b - 0,7b = -2,7b