Решите уравнения пожалуйста
1)4целых 5/9-1/6x=5*(1+0,1x)
2)(2x-5)*(x+7/11)=0
3)x*(x+2/5)*(x-17)=0
1)4целых 5/9-1/6x=5*(1+0,1x)
2)(2x-5)*(x+7/11)=0
3)x*(x+2/5)*(x-17)=0
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1) 4 5/9 - 1/6х = 5 * (1 + 0,1х) Пояснения:4 5/9 - 1/6х = 5 + 0,5х 0,5х = 5/10х = 1/2х
- 1/6х - 1/2х = 5 - 4 5/9
- 1/6х - 3/6х = 4 9/9 - 4 5/9 -1/6х - 3/6х = -4/6х = -2/3х
- 2/3х = 4/9
х = 4/9 : (-2/3) = 4/9 * (-3/2) = - (2*1)/3*1) = - 2/3
Ответ: - 2/3.
2) (2х -5) * (х + 7/11) = 0
2х - 5 = 0 х + 7/11 = 0
2х = 5 х = - 7/11
х = 5 : 2
х = 2,5
Ответ: 2,5 и (-7/11).
3) х * (х + 2/5) * (х - 17) = 0
х = 0 х + 2/5 = 0 х - 17 = 0
х = - 2/5 х = 17
Ответ: 0, (-2/5) и 17.