Question

Peшите уравнения:
2-(3x-7)/4+(x+17)/5=0

(4x+7)/5+(3x-2)/2-(5x-2)/2=32

Answer 1

(- 3x + 9) / 4 = - ( x + 17) / 5
( - 3x + 9) / 4 = ( - x - 17) / 5
5 ( - 3x + 9) = 4( - x - 17)
- 15x + 45 = - 4x - 68
- 15x + 4x = - 45 - 68
- 11x = - 113
11x = 113
x = 113/11
x = 10целых 3/11

приводим к общему знаменателю и решаем:
( 8x + 14 + 15x - 10 - 25x + 10) / 10 = 32
( - 2x + 14) / 10 = 32/1
- 2x + 14 = 32 × 10
- 2x + 14 = 320
- 2x = 320 - 14
- 2x = 306
2x = - 306
x = - 306/2
x = - 153