( X + 175 ) : 5 + 30 =420 + 65 x 4

 ( X + 175 ) : 5 + 30 = 680

 ( X + 175 ) : 5        = 680 - 30 = 650

 ( X + 175 )             = 650 x 5 = 3250

   X                        = 3250 - 175 = 3075

( X + 175 ) : 5 + 30 = 420 + 65 x 4

( X + 175 ) : 5 + 30 = 420 + 260

( X + 175 ) : 5 + 30 = 680

( X + 175 ) : 5=680-30

( X + 175 ) : 5=650

X + 175=650x5

X + 175=3250

X=3250-175

X=3075

a. 420+65×4=(x+175):5+30

(x+175):5+30=420+260

(x+175):5+30=680

(x+175):5=650

x+175=3250

x=3075

b.(32×15):2=(x+70):14-40

(x+70):14-40=480:2

(x+70):14-40=240

(x+70):14=280

x+70=3920

x=3850

~~~~~~~~~~~ai đi ngang qua nhớ để lại k ~~~~~~~~~~~~~ 

~~~~~~~~~~~~ Chúc bạn sớm kiếm được nhiều điểm hỏi đáp ~~~~~~~~~~~~~~~~~~~

~~~~~~~~~~~ Và chúc các bạn trả lời câu hỏi này kiếm được nhiều k hơn ~~~~~~~~~~~~

mik khỏi chép lại đề nha

a) 680 = (x + 175) : 5 + 30

    (x + 175) : 5 = 680 - 30

    (x + 175) : 5 = 650

     x + 175 = 650 x 5

     x + 175 = 3250

     x = 3250 - 175

     x = 3075

b) 240 = (x + 70) : 14 - 40

   (x + 70) : 14 = 240 + 40

   (x + 70) : 14 = 280

    x + 70 = 280 x 14

    x + 70 = 3920

    x = 3920 - 70

    x = 3850

tk mik nha b

     x + 175 = 130

     x =

hai dòng cuối b cứ coi là ko có đi ha

mik bấm lộn

420 + 65 x 4 = ( x + 175 ) : 5 + 30

( x + 175 ) : 5 + 30 = 420 + 65 x 4

( x + 175 ) : 5 + 30 = 420 + 260

( x + 175 ) : 5 + 30 = 680

( x + 175 ) : 5 = 680 - 30

( x + 175 ) : 5 = 650

 x + 175 = 650 x 5 

 x + 175 = 3250

          x = 3250 - 175

          x = 3075

Bài dễ không làm. 

3075 bai de ma tinh mot ti la xong

420 + 65 . 4 = ( x + 175 ) : 5 + 30

420 + 260 = ( x + 175 ) : 5 + 30

680 = ( x + 175 ) : 5 + 30

680 - 30 = ( x + 175 ) : 5

650 = ( x + 175 ) : 5

650 . 5 = x + 175

3250 = x + 175

x = 3250 - 175

x = 3075

420+260=(x+175):5+30

680=(x+175):5+30

680-30=(x+175):5

650x5=x+175

3250=x+175

X=3250-175

X=3075

\(420+65.4=\left(x+175\right):5+30\)

\(680=\left(x+175\right):5+30\)

\(\left(x+175\right):5=680-30\)

\(\left(x+175\right):5=650\)

\(x+175=650.5\)

\(x+175=3250\)

              \(x=3250-175\)

              \(x=3075\)

a)\(2.x-138=8.9\)

\(2.x-138=72\)

\(2.x=72+138\)

\(2.x=210\)

\(x=210\div2\)

\(x=105\)

b)\(\left\{\left(6x-72\right)\div2-84\right\}.28=5628\)

\(\left(6x-72\right)\div2-84=201\)

\(\left(6x-72\right)\div2=285\)

\(6x-72=570\)

\(6x=642\)

\(x=107\)

c)\(420+65.4=\left(x+175\right)\div5+30\)

\(420+260=\left(x+175\right)\div5+30\)

\(680=\left(x+175\right)\div5+30\)

\(650=\left(x+175\right)\div5\)

\(3250=x+175\)

\(3075=x\)

a) 2 * x - 138 = 72

    2 * x          = 72 + 138

    x                = 210 \ 2

    x                = 105

Mk thay x=y nha!!!

a)2xy-138=8x9

2xy-138=72

2xy=72+138

2xy=210

y=210:2

y=105

b){(6xy-72):2-84)}x28=5628

{(6xy-72):2-84)}x28=5628

{(6xy-72):2-84=201

{(6xy-72):2=285

(6xy-72)=570

6y=570+72

6y=642

=>y=107

c)420+65x4=(y+175):5+30

680=(y+175):5+30

650=(y+175):5

3250=y+175

y=3250-175

y=3075

420+65.4=(x+175):5+10

<=>680=(x+175):5+10

<=>(x+175):5=680-10

<=>(x+175):5=670

<=>x+175=670.5

<=>x+175=3350

<=>x=3175

420 + 65 . 4 = ( x + 175 ) : 5 + 30 

=> ( x + 175 ) : 5 + 30 = 420 + 45 . 4 

=> ( x + 175 ) : 5 + 30 = 600 

=> ( x + 175 ) : 5 = 600 - 30 

=> ( x + 175 ) : 5 = 570 

=> x + 175 = 570 . 5 

=> x + 175 = 2850 

=> x = 2850 - 175 

=> x = 2675 

nha bn 

các câu khác tương tự nhé 

nhớ ủng hộ mik nha mn 

\(\text{Tìm x hở e????}\)

~~~~~~~~~

\(\text{420 + 65 . 4 = ( x + 175 ) : 5 + 30}\)

\(420+260=\left(x+175\right):5+30\)

\(680=\text{ ( x + 175 ) : 5 + 30}\)

\(\text{ ( x + 175 ) : 5 + 30=680}\)

\(\text{ ( x + 175 ) : 5 =680-30}\)

\((x+175):5=650\)

\(x+175=650:5\)

\(x+175=130\)

\(x=130-175\)

\(x=-45\)

\(\text{(32.15) : 2 = (x + 70) : 14 - 40}\)

\(480:2=\text{ (x + 70) : 14 - 40}\)

\(240\text{ = (x + 70) : 14 - 40}\)

\(\text{ (x + 70) : 14 =280}\)

\(x+70=3920\)

\(x=3920-70\)

\(x=3850\)

\(\text{x - 4867 = ( 175 . 2050 . 76) + 25 + 23}\)

\(\text{x - 4867 = ( 175 . 2050 . 76) + 48}\)

\(x-4867=27265000+48\)

\(x-4867=27265048\)

\(x=27265048+4867\)

\(x=27260015\)

\(\text{Hok giỏi nhé!~!!}\)

\(1) 420+65.4=(x+175):5+30\)

\(\implies 420+260=(x+175):5+30\)

\(\implies 680=(x+175):5+30\)

\(\implies 650=(x+175):5\)

\(\implies 650.5-175=x\)

\(\implies 3075=x\)

\(2)x-4867=(175.2050.70):25+23\)

\(\implies x-4867=1004500+23\)

\(\implies x-4867=1004523\)

\(\implies x=1009390\)

\(3) 134-[(96-7x):4-2]=126\)

\(\implies (96-7x):4-2=8\)

\(\implies(96-7x):4=10\)

\(\implies 96-7x=40\)

\(\implies 7x=56\)

\(\implies x=8\)

\(4) 4-\{100-[(100-5x):8-5]:10\}:25=0\)

\(\implies 4-\{100-[(100-5x):8-5]:10\}=0\)

\(\implies 100-[(100-5x):8-5]:10=4\)

\(\implies 100-[(100-5x):8-5]=40\)

\(\implies (100-5x):8-5=60\)

\(\implies (100-5x):8=65\)

\(\implies 100-5x=520\)

\(\implies 5x=-420\)

\(\implies x=-84\)

~ Hok tốt a~

ai nua cac ban

ban nao biet thi minh h