Question

решите пожалуйста 1)1/3x+6=1 2)x-5/2-1=6x/7 3)16-(2x+5)=30

Answer 1

1) 1/3x + 6 = 1
1/3x = 1 - 6
1/3x = - 5
x= - 5 × 3
x = - 15

2) x - 5/2-1 = 6x / 7
x - 5 / 1 = 6x/7
6x = 7( x - 5)
6x = 7x - 35
6x - 7x = - 35
- x = - 35
x = 35

3) 16 - ( 2x + 5) = 30
16 - 2x - 5 = 30
- 2x = 30 - 11
- 2x = 19
2x = - 19
x = - 9,5