nhận xét 3 >0
=> /3x+1/= 3x+1
/4-x/= 4-x
ta có 3x+1 + 4 -x = 3
=> 2x + 5 = 3
=> 2x = -2
=> x= -1
Đúng 0
Bình luận (0)
Các câu hỏi tương tự
tim x biet
1/4+1/3:3x=-5
Tim x biet:
a,[3x-4]=x
b,[x+8]=-3.x
c,[5x-3] = 2x+1
tim x biet
3x+4 chia het cho x-3
2x-1 chia het cho x+1
giup mik voi tim x biet
1, 5-(3x+6)>-2x+1
2, -7.(x+2)-3x<6-11x
3, (x+1).(x+2)-x.(x+3)<4-x
4, 6-2x>17+(4-x)
Tim x biet: x+1/1+2x+3/3+3x+5/5+...............+20x+39/9=22+4/3+6/5+................+40/39
tim x biet 45-3x+2.{3-x}=4
tim x biet:
a,10-2(4-3x)=-4
b,-12+3(-x+7)=-18
tim x thuoc z , biet : 2x-3/3 + -3x +4/4+5x-12/5 = 241/60
Tim x biet:
A. (x-3/4).(3x+1/2)lon hon hoac bang 0
B. (2x+1).(4x+3)be hon hoac bang 0