a, x = 384

b, x = 161

c, x = 8

d, x = 15

X

\(\left(x-140\right):7=33-23.3\\ \left(x-140\right):7=33-69\\ \left(x-140\right):7=-36\\ x-140=-36.7\\ x-140=-252\\ x=-252+140\\ x=-112\)

\(\left(x-140\right):7=33-23.3\)
\(\left(x-140\right):7=33-69\)
\((x-140):7=-36\)
\(x-140=-252\)
\(x=-112\)

\((x-140):7=33-23.3\)

\((x-140):7=33-69\)

\((x-140):7=-36\)

\(x-140=-36.7\)

\(x-140=-252\)

\(x=-252+140\)

\(x=-112\)

a) 195 - x: 17 = 125 

     x : 17 = 195 - 125 = 70

    x = 70 . 17

    x = 1190

b) 32 . 15 : 2 = (x + 70) : 14 - 40

     240 = ( x + 70) : 14 - 40

(x + 70) : 14 = 280

x + 70 = 280 . 14 = 3920

x = 3920 - 70 

x = 3850

A)195-x:17=125

=\(x:17=195-125\)

\(x:17=70\)

\(x=70.17\)

=>x=\(1190\)

B) 32.15:2=(x+70):14-40

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

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

\(=\left(x+70\right):14-40=240\)

\(=\left(x+70\right):14=240+40\)

\(\left(x+70\right):14=280\)

=>\(x+70=280.14\)

\(x+70=3920\)

=> x=\(3920-70\)

=>x=\(3850\)

a) 195 - x : 7 = 125

            x : 7 = 195 - 125

            x : 7 =      70

            x      =  70 x 7

            x      =    140.

b) 32 x 15 : 2 = ( x + 70 ) : 14 - 40

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

            240   = ( x + 70 ) : 14 - 40

            ( x + 70 ) : 14 - 40 = 240

            ( x + 70 ) : 14        = 240 - 40

            ( x + 70 ) : 14        =      200

              x + 70                 =  200 x 14

              x + 70                 =      2800

              x                         = 2800 - 70

              x                         =     2100.         

\(a,\Rightarrow6x+70=130\Rightarrow6x=60\Rightarrow x=10\\ b,\Rightarrow240=\left(x+70\right):14-40\\ \Rightarrow\left(x+70\right):14=280\\ \Rightarrow x+70=3920\Rightarrow x=3850\\ c,\Rightarrow x-15=75\Rightarrow x=90\\ d,\Rightarrow\left(x+175\right):5=680-30=650\\ \Rightarrow x+175=3250\Rightarrow x=3075\\ e,\Rightarrow x-4867=1004523\Rightarrow x=1009390\\ f,\Rightarrow x+32-17=24\Rightarrow x=9\\ g,\Rightarrow3\left(x+1\right)=54\Rightarrow x+1=18\Rightarrow x=17\\ h,\Rightarrow19\left(35:x+3\right)=152\\ \Rightarrow35:x+3=8\Rightarrow35:x=11\Rightarrow x=\dfrac{35}{11}\)

\(\left(32\cdot15\right):2=\left(x+70\right):14-40\)

\(=240=\left(x+70\right):14-40\)

\(\Rightarrow\left(x+70\right):14=240+40\)

\(\Rightarrow x+70=280\cdot14\)

\(\Rightarrow x=3920-70\)

\(\Rightarrow x=3850\)

Ủng hộ mk nkoa!@^_^@

(32.15):2=(x+70):14-40

=>(x+70):14-40=480:2=240

=>(x+70):14=240+40=280

=>x+70=280x14=3920

=>x=3920-70=3850

(32 . 15) : 2 = (x + 70) : 14 - 40

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

240 = (x + 70) : 14 - 40

(x + 70) : 14 = 280

x + 70 = 280 x 14 = 3920

x = 3920 - 70 = 3850

(32.15):2=(x+70):14-40

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

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

=>(x+70):14=240+40

=>(x+70):14=280

=>x+70=280*14

=>x+70=3920

=>x=3850

12.35+.182 - 35.94

giúp mình với

( 32. 15) : 2 = ( x - 70) . 14 - 40

240             = ( x- 70). 14 - 40

240+40       = (x-70).14

280            = ( x- 70).14

280:14       = x- 70

20            = x - 70

20+70       = x

90 = x hay x= 90

k mik nhaaaaaaaaaaaaaaaaa

\(\frac{\Rightarrow480}{2}=14x-980-40\)

\(\Leftrightarrow240+1020=14x\)

\(\Leftrightarrow x=\frac{1260}{14}=90\)

đáp số = 90 nha bạn