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Мудрец
(14801)
2 недели назад
200.
6x = 28 - x 6x + x = 28 7x = 28 x = 4
9x - 26 = 30 - 5x 9x + 5x = 30 + 26 14x = 56 x = 4
7 - 3x = 6x - 56 -3x - 6x = -56 - 7 -9x = -63 x = 7
0,9x - 7,4 = -0,4x + 4,3 0,9x + 0,4x = 4,3 + 7,4 1,3x = 11,7 x = 9
5,8 - 1,6x = 0,3x - 1,8 -1,6x - 0,3x = -1,8 - 5,8 -1,9x = -7,6 x = 4
(3/8)x + 19 = (7/12)x + 24 (3/8)x - (7/12)x = 24 - 19 (9/24)x - (14/24)x = 5 (-5/24)x = 5 x = -24
201.
5(x - 4) = x + 8 5x - 20 = x + 8 5x - x = 8 + 20 4x = 28 x = 7
9 - 7(x + 3) = 5 - 6x 9 - 7x - 21 = 5 - 6x -7x + 6x = 5 - 9 + 21 -x = 17 x = -17
(7x + 9) - (11x - 7) = 8 7x + 9 - 11x + 7 = 8 -4x + 16 = 8 -4x = -8 x = 2
19,6 + y = 7(1,2 - y) 19,6 + y = 8,4 - 7y y + 7y = 8,4 - 19,6 8y = -11,2 y = -1,4
0,4(6 - 4y) = 0,5(7 - 3y) - 1,9 2,4 - 1,6y = 3,5 - 1,5y - 1,9 -1,6y + 1,5y = 3,5 - 1,9 - 2,4 -0,1y = -0,8 y = 8
(3/4)((1/6)x - (1/3)) = 2x - 11.5 (3/4)((1/6)x - (2/6)) = 2x - 23/2 (3/4)((x - 2)/6) = 2x - 23/2 (3/24)(x - 2) = 2x - 23/2 (1/8)(x - 2) = 2x - 23/2 x/8 - 2/8 = 2x - 23/2 x/8 - 1/4 = 2x - 23/2 x/8 - 2x = 1/4 - 23/2 x/8 - 16x/8 = 1/4 - 46/4 -15x/8 = -45/4 x = (-45/4) * (-8/15) x = 6