Question

Tìm x:

a) 2 ( x + 2 ) + ( x + 2) = 6

b) 2 ( x + 2 ) + 3 x = 19

c) 3 ( x +1 ) + 2 ( x + 2 )=117

                GIÚP MÌNH NHA, MÌNH ĐANG CẦN GẤP.CẢM ƠN!

Answer 1

a) 2 ( x + 2 ) + ( x + 2) = 6

  2x+4+x+2=6

2x+x+4+2=6

3x+6=6

3x=3-3

3x=0

x=0

b) 2 ( x + 2 ) + 3 x = 19

2x+4+3x=19

2x+3x+4=19

5x+4=19

5x=19-4

5x=15

x=3

 c) 3 ( x +1 ) + 2 ( x + 2 )=117

    3x+3+2x+4=117

   3x+2x+3+4=117

   5x+7=117

   5x=110

  x = 25 ( chac zay )

Answer 2

a,2.(x+2)+(x+2)=6

x+2+x+2=6:2

(x+2)*2=3

x+2=3*2

X+2=6

X=4

Answer 3

b,2.(x+2)+3*x=19

2*x+2*2+3*x=19

2*x+4+3*x=19

x*(3+2)+4=19

x*5+4=9

x*5=9-4

x*5=5

x=5:5

x=1

Answer 4

c,3*(x+1)+2*(x+2)=117

3*x+3*1+2*x+2*2=117

3*x+3+2*x+4=117

x*(2+3)+3+4=117

x*5+7=117

x*5=117-7

x*5=110

x=110:5

x=22