360 : (x-7 ) = 90

( x - 7 )       =  360 : 90

x  - 7                 =  4

          x            =  4 + 7

           x              = 11

Tìm x thuộc N biết:

X+245=43×11

=>x+245=473

=>x=228

X-382=159:3

=>x-382=53

=>x=53+382=438

7×X+2×X=918

=>(7+2).x=918

=>9x=918

=>x=918:9=102

3×(X-2)+150=240

=>3.(x-2)=240-150

=>3.(x-2)=90

=>x-2=90:3=30

=>x=30+2=32

(X+13):5=12

=>(x+13)=12.5

=>x+13=60

=>x=60-13

=>x=47

Bấm **** nha

360:(X-7)=90

X+245=43*11

X+245=473

x=473-245

X=228

X-382=159:3

X-382=53

X=382+53

X=435

7*X+2*X=918

(7+2)*X=918

9*X=918

X=918:9

X=102

3*(X-2)+150=240

3*(X-2)=240-150

3*(X-2)=90

X-2=90:3

X-2=30

X=30-2

X=28

(X+13):5=12

X+13=12*5

X+13=60

X=60-13

X=47

360:(X-7)=90

X-7=360:90

X-7=4

X=7+4

X=11

3.(x-2)+150=240

=>3.(x-2)=90

=>x-2=30

=>x=32

360:(x-7)=90

=>x-7=4

=>x=11

Cau cuối mình không hiểu đề cho lắm

         7.x + 2.x = 927

\(\Leftrightarrow\)( 7 + 2).x =927

\(\Leftrightarrow\)9.x = 927

\(\Leftrightarrow\)x = 927 : 9

\(\Leftrightarrow\)x = 103

Vậy x = 103

          3(x-2)+150=240

\(\Leftrightarrow\)3(x-2)=240-150

\(\Leftrightarrow\)3(x-2)=90

\(\Leftrightarrow\)x-2=90:3

\(\Leftrightarrow\)x-2=30

\(\Leftrightarrow\)x=30+2

\(\Leftrightarrow\)x=32

Vậy x=32

          ( x + 13 ) : 5 = 120

\(\Leftrightarrow\)x + 13 = 120 \(\times\)5

\(\Leftrightarrow\)x + 13 = 600

\(\Leftrightarrow\)x = 600 - 13

\(\Leftrightarrow\)x = 587

Vậy x = 587

          360:(x-7)=90

\(\Leftrightarrow\)x-7=360:90

\(\Leftrightarrow\)x-7=40

\(\Leftrightarrow\)x=40+7

\(\Leftrightarrow\)x=47

Vậy x=47

                                 7.x + 2.x = 927

                                 x.(7 + 2) = 927

                                 x.9 = 927

                                 x = 927 : 9

                                 x = 103

                             Vậy x = 103

                     3(x - 2) + 150 = 240

                    3(x - 2) = 240 - 150

                    3.(x - 2) = 90

                    x - 2 = 90 : 3 = 30

                    x = 30 + 2 = 32

                  Vậy x = 32

                 (x + 13) : 5 = 120

                 x + 13 = 120 x 5 = 600

                x = 600 - 13 = 587

                Vậy x = 587

              360:(x - 7) = 90

                    x - 7 = 360 : 90 = 4

                   x = 4 + 7 = 11

                   Vậy x = 11

             Ủng hộ mk nha !!! ^_^

\(\left(2x+13\right):5=17\)

\(\Rightarrow2x+13=17.5\)

\(\Rightarrow2x+13=85\)

\(\Rightarrow2x=85-13\)

\(\Rightarrow2x=72\Rightarrow x=\frac{72}{2}=36\)

\(360:\left(11x-7\right)=90\)

\(11x-7=\frac{360}{90}\)

\(\Rightarrow11x-7=4\)

\(\Rightarrow11x=4+7=11\)

\(\Rightarrow x=\frac{11}{11}=1\)

\(30:\left(3x-7\right)=15\)

\(\Rightarrow3x-7=\frac{30}{15}=2\)

\(\Rightarrow3x=2+7=9\)

\(\Rightarrow x=\frac{9}{3}=3\)

a,\(\left(2x+13\right):5=17\)

\(2x+13=17.5\)

\(2x=72\)

\(x=72:2\)

\(x=36\)

b,\(360:\left(11x-7\right)=90\)

\(11x-7=4\)

\(11x=11\)

\(x=1\)

c,\(30:\left(3x-7\right)=15\)

\(3x-7=2\)

\(3x=9\)

\(x=3\)

(2x + 13): 5 =17

2x + 13=85

2x=72

x=36

360 :(11x -7)=90

11x - 7=4

11x=11

x=1

30 : (3x - 7)=15

3x-7=2

3x=9

x=3

x + 90 = 360 + 30

x + 90 = 390

        x = 390 - 90

        x = 300

kết bạn rùi k mik nhé

x +90 = 360 +30

x + 90 = 390

x = 390 - 90

x = 300

ai k mk mình k lại nha

x + 90 = 360 + 30

x + 90 = 390

        x = 390 - 90

        x = 300                     ai k mk,mk k lại~~

y + 60 = 360 + 90

y + 60 = 450

y        = 450 - 60

y        = 390

y - 60 = 360 - 90

y - 60 = 270

y       = 270 + 60

y       = 330

y + 60 = 360 + 90

y + 60 = 450

        y = 450 - 60

        y = 390

y - 60 = 360 - 90

y - 60 = 270

      y = 270 + 60

      y = 330

y+60=360+90

y+60=450

     y =450-60

     y =390.

y-60=360-90

y-60=270

    y =270+60

    y =330.