2.(x-5)-3.(x+7)=14
-> 2x-10-3x-21=14
->-x-31=14
->-x=45
->x=-45
đáp án đúng là -45 bạn phạm thị khánh ly làm sai rồi nhé
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 so tu nhien nho nhat khac 0 biet rang (x+5):5; (x-12):6 ; (14 +x ) :7 tra loi x =
tim x, biet
a. x + 7 = 15
b. 3 nhan - 14 = 16
tim x biet
(3.x-5)-(2.x-7)=0
tim x;biet
a;x-14=3.x+18
b;|x+3|+|x+9|+|x+5|=4x
tim so tu nhien x biet :((10 x)x 2 5 ) :3 -2 = 7
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,-12/21×x + 3/7=-4/3, b, 2x +-3^2=5/4 , c, 75% x- 2/5=3/10, d, (3x-2)×(x+7)
