1. Розв'яжи рiвняння.
1 1
a) x-5=2x+2'
Розв'яжи задачу.
6)
3x+1_x_1-x.
1-х
6
4
8
2-х
B) 2-X+2=3*2*
5
1 1
a) x-5=2x+2'
Розв'яжи задачу.
6)
3x+1_x_1-x.
1-х
6
4
8
2-х
B) 2-X+2=3*2*
5
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Ответ:
а)
x-5= 1/2x + 1/2
2x - 10 = x + 1
2x - x = 1 + 10
x = 11
б)
3x+1/4 - x/6 = 1-x/8
6 ( 3x + 1 ) - 4x = 3 ( 1 - x )
18x - 6 -4x = 3x
14x + 6 = - 3x
14x + 3x = 3 - 6
17x = - 3
x= - 3/17
в)
2-x/5 + 2 = 3+2x/2
2 ( 2 - x ) + 20 - 5 ( 3 + 2x )
4 - 2x + 20 = 15 + 10 x
24 - 2x = 15 + 10x
- 2x - 10x = 15 - 24
- 12x= -9
x= 3/4