Tim x biet
|x+1|+|x+2|+|x+3|=4x
Tim x biet(4x-3)-(x+5)=(x+2)-2×(x-10)
mình không biết cách làm, nhưng mình biết x = 7,5
\(4x-3-x-5-=x+2-2x+2.10\)
\(3x-8=x+2-2x+20\)
\(3x=x+10-2x+20\)
\(3x=-x+30\)
\(4x=30\)
\(x=\frac{30}{4}=7,5\)
Cam on cac b mk cx ra ket qua la 7,5
(tim x biet (x+1)(2-x)-(3x+5)(x+2)=-4x^2+1
tim x biet
(x-2)^2=4x^2+4x+1
a, Tim x biet:/x-2/+/3-2x/=2x+1
b, Tim x,y thuoc Z biet:xy+2x-y=5
c, tim x,y,z, biet :2x=3y;4y=5zva 4x-3y+5z=7
Tim x biet
a) 3x+5-2(x+4)=4x+1/2b)(x+1)(x-1) <0c)(x-2)(x+2/3) >0tim x biet :
a) ( 2x^2+4 ) - (x^2-3/2 ) = (-3+4x^2)+ ( -4x^2/3+1)
b) ( I xI -4) - ( 2- I-xI ) = 1/3 . I xI -5
tim x biet (x+1)*(2x-1)*(4x+3) lon hon 0
tim x biet x<0
/x-2/+3/2-x/+/4x-8/=32
bai1.tim x biet:
a,(x+2).(x+3)-(x-2).(x+5)=0
b,(2x+3).(x-4)+(x-5).(x-2)=(3x-5).(x-4)
c,(8x-3).(3x+2)-(4x+7).(x+4)=(2x+1).(5x-1)=33
,(8x-3).(3x+2)-(4x+7).(x+4)=(2x+1).(5x-1)-33 đúng không bạn