Question

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

Answer 1

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