541+(218-x)=375

541+218-x=375

759-x=375

x=384

5 .(x+35)=515

x+35=103

x=68

10+2.x=4^5:4

10+2.x=256

2x=246

x=123

96-3.(x+1)=42

3(x+1)=54

x+1=18

x=17

=.= hok tốt!!

\(541+\left(218-x\right)=375.\)

\(\Leftrightarrow218-x=-166\)

\(\Leftrightarrow x=218-\left(-166\right)\)

\(\Leftrightarrow x=384\)

\(5.\left(x+35\right)=515\)

\(\Leftrightarrow x+35=103\)

\(\Leftrightarrow x=103-35\)

\(\Leftrightarrow x=68\)

\(10+2x=4^5:4\)

\(\Leftrightarrow10+2x=4^4\)

\(\Leftrightarrow10+2x=256\)

\(\Leftrightarrow2x=256-10\)

\(\Leftrightarrow2x=246\)

\(\Leftrightarrow x=123\)

\(96-3.\left(x+1\right)=42\)

\(\Leftrightarrow3.\left(x+1\right)=96-42\)

\(\Leftrightarrow3\left(x+1\right)=54\)

\(\Leftrightarrow x+1=54:3\)

\(\Leftrightarrow x+1=18\)

\(\Leftrightarrow x=17\)

541 + ( 218 - x ) = 375

<=> 218 - x = 375 - 541

<=> 218 - x = -166

<=> x = 218 + 166

<=> x = 384

\(\frac{11}{13}-\left(\frac{5}{42}-x\right)=\frac{113}{364}\)

\(\left(\frac{5}{42}-x\right)=\frac{11}{13}-\frac{113}{364}\)

\(\left(\frac{5}{42}-x\right)=\frac{15}{28}\)

\(x=\frac{5}{42}-\frac{15}{28}\)

\(x=-\frac{5}{12}\)

vậy \(x=-\frac{5}{12}\)

5 nhaaa

giải thích mới k

=> (x+25) x 31 = 930

=> x + 25 = 30

=> x = 5

(x+ 2 ) +( x + 12 ) + ( x + 42 ) + ( x + 47 ) = 655

=>x+ 2  + x + 12  +  x + 42  +  x + 47  = 655

=>(x+  x+  x+  x )+ (2  + 12   + 42   + 47)  = 655

=>4x+103=655

=>4x=552

=>x=138

(x+ 2 ) +( x + 12 ) + ( x + 42 ) + ( x + 47 ) = 655

=>(x+x+...+x)+(2+7+...+47)=655

=>10x+245=655

=>10x=655-245

=>10x=410

=>x=410:10

=>x=41

•๖ۣۜAƙαĭ ๖ۣۜHαɾυмα•™ sao lại ra 41 ?

có 4x thôi mà?

1) \(541+\left(218-x\right)=375\)

\(\Leftrightarrow759-x=375\)

\(\Leftrightarrow x=384\)

2) \(5\cdot\left(x+35\right)=515\)

\(\Leftrightarrow x+35=103\)

\(\Rightarrow x=68\)

3) \(96-3\cdot\left(x+1\right)=42\)

\(\Leftrightarrow3\cdot\left(x+1\right)=54\)

\(\Leftrightarrow x+1=18\)

\(\Rightarrow x=17\)

4) \(2\cdot x-138=2^3\cdot3^2\)

\(\Leftrightarrow2\cdot x-138=72\)

\(\Leftrightarrow2\cdot x=210\)

\(\Rightarrow x=105\)

ta phân tích từ đó x là B(630

NHỚ K NHA

TL :

Vì 42 , 90 chia hết cho x nên  x e  ƯCLN ( 42 , 90 )

Ta có :

     42 = 2 . 3 . 7

     90 = 2 . 3² . 5

ƯCLN ( 42 , 90 ) =  2 . 3 = 6

   vậy x = 6

là tự học

42-2(x+16) +12 :2=6(x-1)+ (-4)^3 :16

42- 2x- 32 +6 = 6x - 6 - 64: 16

(42 - 32 +6) - 2x = 6x - 6 - 4

16 = 2x = 6x- 10

16+10= 2x+6x

26= 8x 

x= 26/8

x= 13/4

42-2(x+16)+12:2=6(x-1)+(-4)³:16

42-2(x+16)+6=6(x-1)-64:16

42-2x-32+6=6x-6-4

-2x+16=6x-10

6x+2x=16+10

8x=26

x=3,25

(100 + 42 ) x 42 + ( 200 - 58 ) x 58 

= 142 x 42 + 142 x 58

= 142 x ( 42 + 58 )

= 142 x 100

= 14200

( 100 + 42 ) x 42 + ( 200 - 58 ) x 58

= 142 x 42 + 142 x 58

= 142 x ( 42 + 58 )

= 142 x 100

= 14200

(100 + 42 ) x 42 + ( 200 - 58 ) x 58 

= 142 x 42 + 142 x 58

= 142 x ( 42 + 58 )

= 14 200

Mong các bạn ủng hộ nha !!!! Ai đi qua xin để lại 1 k nhaaaa !!!

Làm ơn hãy k mk nhé !! 

96-3(x+1)=42

3(x+1)=54

x+1=18

x=18+1

x=19

Vậy x=19

96-3(x+1)=42

3(x+1)=96-42=54

x+1=54:3=18

x=18-1=17

vay x=17

la -ko phai +dau bn oi