Алгебра
Английский
Биология
География
Геометрия
История
Русский
Обществознание
Физика
Химия
Информатика
Литература
МатематикаВопрос:
201. Найдите корень уравнения:
Ответ:
1) 4(x - 6) = x - 9 => 4x - 24 = x - 9 => 3x = 15 => x = 5.
2) 6 - 3(x + 1) = 7 - 2x => 6 - 3x - 3 = 7 - 2x => 3 - 3x = 7 - 2x => -4 = x.
3) (8x + 3) - (10x + 6) = 9 => 8x + 3 - 10x - 6 = 9 => -2x - 3 = 9 => -2x = 12 => x = -6.
4) 3,5 - x = 8(x + 2,8) => 3,5 - x = 8x + 22,4 => 3,5 - 22,4 = 9x => -18,9 = 9x => x = -2,1.
5) 0,3(6 - 2y) = 4,5 - 0,7(y + 9) => 1,8 - 0,6y = 4,5 - 0,7y - 6,3 => 1,8 - 0,6y = -1,8 - 0,7y => 0,1y = -3,6 => y = -36.
6) 3/5(7/9x - 1/3) = x - 2 1/3 => 7/15x - 1/5 = x - 7/3 => 7/15x - x = -7/3 + 1/5 => -8/15x = (-35 + 3)/15 => -8/15x = -32/15 => x = 4.
2) 6 - 3(x + 1) = 7 - 2x => 6 - 3x - 3 = 7 - 2x => 3 - 3x = 7 - 2x => -4 = x.
3) (8x + 3) - (10x + 6) = 9 => 8x + 3 - 10x - 6 = 9 => -2x - 3 = 9 => -2x = 12 => x = -6.
4) 3,5 - x = 8(x + 2,8) => 3,5 - x = 8x + 22,4 => 3,5 - 22,4 = 9x => -18,9 = 9x => x = -2,1.
5) 0,3(6 - 2y) = 4,5 - 0,7(y + 9) => 1,8 - 0,6y = 4,5 - 0,7y - 6,3 => 1,8 - 0,6y = -1,8 - 0,7y => 0,1y = -3,6 => y = -36.
6) 3/5(7/9x - 1/3) = x - 2 1/3 => 7/15x - 1/5 = x - 7/3 => 7/15x - x = -7/3 + 1/5 => -8/15x = (-35 + 3)/15 => -8/15x = -32/15 => x = 4.
Похожие
