\(\frac{1}{2}\times\left(3x+1\right)-2:3=4\)
\(\frac{1}{2}\times\left(3x+1\right)-\frac{2}{3}=4\)
\(\frac{1}{2}\times\left(3x+1\right)-\frac{1}{2}\times\frac{4}{3}=4\)
\(\frac{1}{2}\times\left(3x+1-\frac{4}{3}\right)=4\)
\(3x+\frac{-1}{3}=4:\frac{1}{2}\)
\(3x+\frac{-1}{3}=8\)
\(3x=\frac{24}{3}-\left(\frac{-1}{3}\right)\)
\(3x=\frac{25}{3}\)
\(x=\frac{25}{3}:3\)
\(x=\frac{25}{9}\)
Tìm x :
a. 10 x X - 1 - 3 - 5 - 7 - .... - 19 = 2 + 4 + 6 + .... + 20 .
b. 3x / 2 + 3x / 6 + 3x / 12 + 3x / 20 + 3x / 30 = 10
Tìm x
X×4/5=15
6/5:x=1/3x:2/7=3/5
12/25×x=4/10
Tìm x
2 x X - 12 + = 8
0,75 x X - 1/4 = 1/2
1+2+3+.......+9=3x (2+1)
Ai giải nhanh và dúng mik tick cho
Tìm x: a, 213-2x X=47
b, 3x(x+1)-300=906
c,7/3-2/3xX=1/4
d,2/5xX+7/8=2
3x (1/1 x 1/2 + 1/2 x 1/3 + 1/3 x 1/4 + 1/4 x 1/5 + 1/5 x 1/6) = 3/4 Cứu pls
Tìm a để: f(x) = (2x^2 + 4x + 1) : (x - 3) dư 4; f(x) = (3x^2 + 4x + 27) : (x + 5) dư 27 - Chia đa thức theo định lý Bézout
1) 5.(x-2)+27=4x-8
2) 3.(x+1)+2.(x+2)=-13
3)(2x+4).(5-x)=0
4)x2 -3x=0
5) x2 -3x+2=0
tìm X
1/17 + 1/2 = 3x - 3/2
1.Tính giá trị biểu thức
a,2+4+8+16+...+1024
b,1x2+2x3+3x+4x5+... + 14x15
2.Tìm x
a, ( 1+x) + ( 2+x) + ( 4+x) + ( 7+x)+...+(22+x) = 77
b,X + 2 x X+3 x X+4 x+ ... + 100 x X = 15150
c,X x X + 1x1+2x2 + 3x3 + 4x4 + ... +20x20 = 2895
