Tim x biết : -12(x-5)+7(3-x)=5
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,biết:
a,15 - 5.(x + 4) = - 12 - 3
b, ( 7 - x ) - ( 25 + 7) = - 25
c, | x + 2 | = 0
d, | x + 3 | + 7 - ( - 2)
e, | x - 5| = | - 7 |
g, - x - 20-(8 - 2x) = (-12-3)
a) <=> 15-5x-20=-12-3
<=> -5x=-12-3-15+20=-10
=>x=-10:(-5)=2
b)<=>7-x-25-7=-25
<=> -x=-25-7+25+7=0 =>x=0
c) /x+2/=0 => x+2=0 =>x=-2
d) sai đề
e)<=> /x-5/ = 7
<=> \(\orbr{\begin{cases}x-5=7\\x-5=-7\end{cases}}\)
<=> \(\orbr{\begin{cases}x=12\\x=-2\end{cases}}\)
g) <=> -x-20-8+2x=-15
<=> x=-15+20+8=13
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 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 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