b) x = 57

=57 nhé

x bằng 57 bạn nha

\(\Leftrightarrow\left[{}\begin{matrix}2x^2-50=0\\-3x-9=0\end{matrix}\right.\Leftrightarrow\left[{}\begin{matrix}x=\pm5\\x=-3\end{matrix}\right.\)

x = 1.5,3

x-1256=5674

        x=5674+1256

        x=6930

X - 1256 = 5674 

X           = 5674 + 1256 

X           = 6930 

Vậy để X - 1256 = 5674 thì X phải bằng 6930 

x= 5674+1256

x=    6930

♥kick cho mk nha

\(x\in\left\{0;7;14;21;28;35;42;49\right\}\)

49

100 - 50:(x-4)=75

50:(x-4)= 100 - 75

50:(x-4)=25

x-4= 50:25

x-4=2

x=2+4

x=6

6 nhaa

\(100-50:\left(x-4\right)=75\)

\(50:\left(x-4\right)=100-75\)

\(50:\left(x-4\right)=25\)

\(x-4=50:25\)

\(x-4=2\)

\(x=2+4\)

\(x=6\)

câu 1 : x= 67-24 

x=43

câu 2 : x= 5674-980

x= 4694 

câu 1 

x= 43

câu 2

 x= 4694

     tk mk nha các bạn

a)     x + 24 = 67

               x  = 67 - 24

               x  = 43

b)    x +  980 = 5674

                x   = 5674 - 980

                x   = 4694

\(\left(x+1005\right)+a=525+\left(1005+a\right)\)

\(x+1005+a=525+1005+a\)

\(x+a-a=525+1005-1005\)

\(x=525\)

vay \(x=525\)

\(\left(b+4672\right)+x=b+4674\)

\(b+4672+x-b=4674\)

\(x=4674-4672\)

\(x=2\)

vay \(x=2\)

a ) ( x + 1005 ) + a = 525 + ( 1005 + a )

( x + 1005 ) + a = ( 525 + 1005 ) + a

( x + 1005 ) + a = 1530 + a

x + a + a = 1530 - 1005

x,a = 525

b ) ( b + 4672 ) + x = b + 4674

b + 4672 + x     = b + 4674

b + b + x = 4674 - 4672

b,x = 2

a) \(\left(2,4-3x\right).0,5=0,9\)

\(2,4-3x=0,9:0,5\)

\(2,4-3x=1,8\)

\(3x=2,4-1,8\)

\(3x=0,6\)

\(x=0,6:3\)

\(x=0,2\)

b) \(\left(8,8x-50\right):0,4=51\)

\(8,8x-50=51.0,4\)

\(8,8x-50=20,4\)

\(8,8x=20,4+50\)

\(8,8x=70,4\)

\(x=70,4:8,8\)

\(x=8\)

c) \(\left(0,472-x\right):2=1,634\)

\(0,472-x=1,634.2\)

\(0,472-x=3,268\)

\(x=0,472-3,268\)

\(x=-2,796\)

d) \(1,6-\left(x-0,2\right)=6,5\)

\(x-0,2=1,6-6,5\)

\(x-0,2=-4,9\)

\(x=-4,9+0,2\)

\(x=-4.7\)

\(a.2,4-3x=1,8\)

\(3x=0,6\)

\(x=0,2\)

\(b.8,8x-50=20,4\)

\(8,8x=70,4\)

\(x=8\)

\(c.0,472-x=3,268\)

\(x=-2,796\)

\(d.x-0,2=-4,9\)

\(x=-4,7\)

a) \(\left(2,4-3x\right).0,5=0,9\)

\(\Rightarrow\left(2,4.3x\right)=0,9:0,5\)

\(\Rightarrow2,4.3x=0,45\)

\(\Rightarrow3x=0,45:2,4\)

\(\Rightarrow3x=\dfrac{3}{16}\)

\(\Rightarrow x=\dfrac{1}{16}\)

b)\(\left(8,8x-50\right):0,4=51\)

\(\Rightarrow\left(8,8x-50\right)=51.0,4\)

\(\Rightarrow8,8x-50=\dfrac{255}{3}\)

\(\Rightarrow8,8x=135\)

\(\Rightarrow x=135:8,8\)

\(\Rightarrow x=\dfrac{675}{44}\)