2.(x - 5) - 3.(x + 7) = 14
=> 2x - 10 - 3x - 21 = 14
=> -x = 14 + 21 + 10
=> -x = 45
=> x = -45
Đúng 0
Bình luận (0)
Tuyển Cộng tác viên Hoc24 nhiệm kì 26 tại đây: https://forms.gle/dK3zGK3LHFrgvTkJ6
Các câu hỏi tương tự
tim x biet 2.(x-5)-3.(x+7)=14
Tim x, biet:
1) -5.(2-x)+4.(x-3)=10.x-15
2) 2.(7x-14)-7.(3x-5)=28
3) 17+x=7+6.x
4) 4.!x-2!=8
5) 4.x-5.(-3+x)=7
mik dag gap lam tra loi nhanh va chi tiet giup mik
tim x de x+5 chia het cho 5 ; x-12 chia het cho 6 ; x+14 chia het cho 7
tim so tu nhien nho nhat khac 0 biet rang (x+5):5; (x-12):6 ; (14 +x ) :7 tra loi x =
tim so nguyen x biet
a,9-25=[7-x]-[25+7]
b,-26-[x-7]=0
c,30+[32-x]=10
d,2.x-18=10
e,3.x+26=5
f,/x/-5=-12+30
g,[/x/+1].[4-2x]=0
h,8+/x/=/-8/+11
i,4.[x+1]-[3x+1]=14
tim x;biet
a;x-14=3.x+18
b;|x+3|+|x+9|+|x+5|=4x
1> 234 + (345 - x ) =500
2> 456 -( x + 23 ) =326
3> ( 567 - x ) x 212 = 605
4> ( 5 x X - 15 ) :5 = 0
5> 14 x ( x - 7 ) = 210
6> 84 -4 x ( 2 x X +1 )= 48
tim x
.
tim x, biet
a. x + 7 = 15
b. 3 nhan - 14 = 16
a,thuc hien phep tinh: 5*(2^2*3^2)^9*(2^2)^6-2*(2^2*3)^14*3^4/5*2^28*3^18-7*2^29*3^18
b,tim cac so nguyen n sao cho: n^2+5*n+9 la boi cua n+3
c,tim x,y nguyen sao cho: xy+2*x+y+11=0