Tim x:(-12)*(x-5)+7*(3-x)=5
-12.[x-5]+7.[3-x]=5 tim x
- 12.[ x - 5 ] + 7.[ 3 - x ] = 5
=> - 12x + 60 + 21 - 7x = 5
=> ( - 12x - 7x ) + 60 + 21 = 5
=> - 19x + 81 = 5
=> - 19x = 5 - 81
=> - 19x = - 76
=> x = ( - 76 ) : ( - 19 )
=> x = 4
Vậy x = 4
-12(x-5)+7(3-x)=5
<=>(-12x)-(-60)+21-7x=5
<=>(-12x)+60+21-7x=5
<=>(-12x-7x)+81=5
<=>(-19x)=5-81=-76
<=>x=(-76):(-19)
<=>x=4
VẬy x=4
sẽ bằng: -12.x-(-12).5+7.3-7.x=5
= -12x+60+21-7x=5
Áp dụng quy tắc chuyển vế ta sẽ có
-12x-7x= 5-60-21= -76
-19x= -76 => x= -76/-19=4
Tim x biết : -12(x-5)+7(3-x)=5
\(-12\times\left(x-5\right)+7\times\left(3-x\right)=5\)
\(-12\times x+12\times5+7\times3-7\times x=5\)
\(x\times\left(-12-7\right)+\left(60+21\right)=5\)
\(x\times\left(-19\right)+81=5\)
\(x\times\left(-19\right)=5-81\)
\(x\times\left(-19\right)=-76\)
\(x=\frac{-76}{-19}\)
\(x=4\)
Chúc bạn học tốt
-12 ( x - 5 ) + 7 ( 3 - x ) = 5
-12x - ( -12 ) . 5 + 7 . 3 - 7x = 5
-12x - ( - 60 ) + 21 - 7x = 5
-12x - 7x - ( - 60 ) + 21 = 5
x . ( - 12 - 7 ) - [( - 60 ) - 21 )] = 5
-19x - ( - 81 ) = 5
-19x = 5 + ( -81 )
-19x = -76
x = (-76) : ( -19)
x = 4
Vậy x = 4
\(-12\left(x-5\right)+7\left(3-x\right)=5\)
\(-12x+60+21-7x=5\)
\(-12x-7x=5-60-21\)
\(-19x=-76\)
\(x=4\)
Tim x thoa man -12 * (x-5) + 7(3-x )=5
-12x+60+21-7x=5
-12x-7x=-60-21+5
-19x=-76
x=4
-12.x + 12.5+7.3-7.x=5
-12.x+ 60+21-7.x=5
-19.x=76
=> không có x
tim x thoa man: -12(x-5)+7(3-x)=5
<=>(-12)(x-5)+7(3-x)=-(19x-81)
=>-(19x-81)=5
<=>81-19x=5
=>-19x=-76
=>x=(-76):(-19)
=>x=4
Tim x biết : -12(x-5)+7(3-x)=5
Nhập -12(x-5)+7(3-x)=5
Bấm Shift+Calc nka bạn!
Nhập -12(x-5)+7(3-x)=5
Bấm Shift+Calc nka bạn!
Đáp án: 4
tim x biet :3/[x+2][x+5]+5[x+5][x+10]+7/[x+10][x+15]=x/[x+12][x+17]
tim x thoa man -12*(x-5)+7*(3-x)=5
(-12) (x - 5) + 7(3 - x) = 5
=> -12x + 60 + 21 - 7x - 5 = 0
=> -19x + 76 = 0
=> -19x = -76
=> x = 4
-12(x-5)+7(3-x)=5
<=>(-12x)-(-60)+21-7x=5
<=>(-12x)+60+21-7x=5
<=>(-12x-7x)+81=5
<=>(-19x)=-76<=>x=4
vậy x=4
Tim x thoa man : -12.(x-5)+7.(3-x0) =5 .
- 12.( x - 5 ) + 7.( 3 - x ) = 5
=> - 12x + 60 + 21 - 7x = 5
=> ( - 12x - 7x ) + 60 + 21 = 5
=> - 19x + 81 = 5
=> - 19x = 5 - 81
=> - 19x = - 76
=> x = ( - 76 ) : ( - 19 )
=> x = 4
Vậy x = 4
-12x+60+21=5
-12x+81=5
-12x=-76
x=19/3 k nha
Tim x biet : - 12 ( x-5) + 7 ( 3 - x ) = 5
\(-12x+60+21-7x=5\)
\(-19x+81=5\)
\(-19x=-76\)
\(x=4\)
vậy....
\(-12.\left(x-5\right)+7.\left(3-x\right)=5\)
\(=>-12x+60+21-7x=5\)
\(=>-19x=5-81=-76\)
\(=>x=\frac{-76}{-19}=4\)
-12x+60+21-7x=5
-19x+81=5
-19x=-76
x=4