Question

11 Determinati soluţiile ecuaţiilor. 7x+4+2(x-5)=8(x+1); c 3(2x+3)+2(3x+2) =9x+4; -3x+5+6(-x+1)=-4(x+6); b 2(x+3)-5(2x+1)=12x-19; d 5(x-2)-2x+3x+1)=6-7x; f 6(x+2)-2(2x+3)+4x=36.​

Answer 1

7x+4+2(x-5)=8(x+1)

7x+4+2x-10=8x+8

9x-6=8x+8

x=15

3(2x+3)+2(3x+2)=9x+4

6x+9+6x+4=9x+4

12x+13=9x+4

3x=-11

x=-11/3

-3x+5+6(-x+1)=-4(x+6)

-3x+5-6x+6=-4x-24

-9x+11=-4x-24

-5x=-35

x=7

2(x+3)-5(2x+1)=12x-19

2x+6-10x-5=12x-19

-8x+1=12x-19

-20x=-20

x=1

5(x-2)-2x+3x+1=6-7x

5x-10-2x+3x+1=6-7x

4x-9=6-7x

11x=15

x=15/11

6(x+2)-2(2x+3)+4x=36

6x+12-4x-6+4x=36

6x=36-6

6x=30

x=5