a)68x(y:35)=1156

⇔ y:35=1156:68

⇔ y:35= 17

⇔ y = 17 x 35

⇔ y = 595

b) 111315:(Y x 123)=181(k chia hết)

⇔ y x 123=  

68 x ( x : 35 ) = 1156

X : 35 = 1156 : 68

X : 35 = 17

X = 17 x 35

X = 595

$111315:(x\times 123)=181$

$x\times 123=111315:181$

$x\times 123=615$

$x=615:123$

$x=5$

Vậy $x=5$

$68\times (x:35)=1156$

$x:35=1156:68$

$x:35=17$

$x=17\times 35$

$x=595$

b)

$111315:(x\times 123)=181$

$x\times 123=111315:181$

$x\times 123=615$

$x=615:123$

$x=5$

Vậy $x=5$

X là: 123 - 3 - 2 = 118

Đáp số: X bằng 118

hok tốtttt

x=118

  X là:118

a)\(162:y+216:y=6\)

⇔\(\left(162+216\right):y=6\)

⇔\(378:y=6\)

⇔\(y=63\)

b)\(602:y+123.2=253\)

⇔\(602:y+246=253\)

⇔\(602:y=7\)

⇔\(y=86\)

c)\(8\left(15720-y\right)=51784\)

⇔\(125760-8y=51784\)

⇔\(8y=73976\)

⇔\(y=9247\)

À mk nhầm
y = -369 

y = -246
Phải ko nhỉ ?

đúng cho 1 k

x=4; y=6,7,8

xy = {47;48 }

và cả 46 nữa

|x+23|^2002|+|y-12|^123=0

<=>|x+23|^2002\(\ge\) 0

      \(\left|y-12\right|^{^{123}}\ge0\)

=>\(\left|x+23\right|^{2002}+\left|y-12\right|^{123}\ge0\)

=>x+23=0=>x=-23

=>y-12=0=>y=12

\(\left|x+23\right|^{2002}+\left|y-12\right|^{123}=0\)

\(\Rightarrow\hept{\begin{cases}\left|x+23\right|^{2002}=0\\\left|y-12\right|^{123}=0\end{cases}}\Rightarrow\hept{\begin{cases}x+23=0\\y-12=0\end{cases}}\Rightarrow\hept{\begin{cases}x=-23\\y=12\end{cases}}\)

Vậy \(x=-23;y=12\)

Vì \(\left|x+23\right|^{2002}\ge0;\left|y-12\right|^{123}\ge0\forall x;y\)

\(\Rightarrow\left|x+23\right|^{2002}+\left|y-12\right|^{123}\ge0\forall x;y\)

Mà đề lại cho \(\left|x+23\right|^{2002}+\left|y-12\right|^{123}=0\)

\(\Leftrightarrow\left|x+23\right|^{2002}=0;\left|y-12\right|^{123}=0\)

\(\Rightarrow x=-23;y=12\)

x =  [{(15129 x 123 ) : 123 } :123] : 123

x = 1

X=0 nha bạn

x + 123 = 123 - 123 + 123

x + 123 = 123

x = 123 - 123

x = 0

x + 123 = 123 - 123 + 123

x + 123 =0 + 123

x + 123 =123 

x = 123 - 123 

x = 0

K MIK NHÉ!

x + 123 = 123 - 123 + 123

x = 123 - 123 + 123 - 123

x = 0