Question

Rezolvati urmatoarele ecuatii:
a) 2(5x-4) -(3x+2)+11=-3(-5x+10)+3x-6(4x-3)
Urgent va rog

Answer 1

2(5x - 4) - (3x + 2) + 11 = -3(- 5x + 10) + 3x - 6(4x - 3)

desfacem parantezele: 

10x - 8 - 3x - 2 + 11 = 15x - 30 + 3x - 24x + 18

grupam termenii asemanatori

10x - 3x - 15x - 3x + 24x = 8 + 2 - 11 - 30 + 18

reducem termenii

13x = -13

x = -13/13

x = -1

Answer 2

[tex] \it 2(5x-4) - (3x-2) +11 = -3(-5x+10) +3x -6(4x-3) \\\;\\ \it Eliminam\ parantezele : \\\;\\ 10x-8-3x-2+11 = 15x-30+3x-24x+18 \\\;\\ \it Separam\ necunoscuta : \\\;\\ 10x-3x-15x -3x+24x = 18-30+8+2-11 \\\;\\ Efectuam\ calculele: \\\;\\ 34x-21x = 28 - 41 \Leftrightarrow \it13x = -13|_{: 13} \Leftrightarrow \ \it x = -1,\ \ S = \{-1\}[/tex]