2.(x+17) = 30
x+17 =30:2
x+17 =15
x= 15-17
x= -2
Vậy x= -2
2.(x+17) =30
x+17 =30:2
x+17 =15
x=15-17
x=-2
2.x+17.2=30
2x+34=30
2x=30-34
2x=-4
x=-2
2.(x+17) = 30
x+17 =30:2
x+17 =15
x= 15-17
x= -2
Vậy x= -2
2.(x+17) =30
x+17 =30:2
x+17 =15
x=15-17
x=-2
2.x+17.2=30
2x+34=30
2x=30-34
2x=-4
x=-2
Tìm x biết:
Bài 2: Tìm x biết:
a/ -x + 8 = -17-30 b/ 35 – x = 37
c/ (-19 – x) + 23 = -20 d/ (x – 45) : 2 = -17
Tìm x biết
d) 32%-0,25:x=-17/5
e)(x+1/5)^2+17/25=26/25
f)-32/27-(3x-7/9)^3=-24/27
g)60%x+0,4x+x:3=2
h)|20/9-x|=1/12+1/20+1/30+1/42+1/56+1/72
i)8/5+(2/7+2/17+2/37/5/7+5/17+5/37).x=16/5
Lưu ý: câu i 2/7+2/17+2/37 phần(vế trên) 5/7+5/17+5/37(vế dưới)
50-[30:(2*x-4)*7]=17
Tìm x biết :
a) -x +8=-17-30
b) 35-x=37
c)(-19-x)+23=-20
d) ( x-45):2=-17
a,30- [4(x-2)+45] =-3
b,(x-17)^4.5^2=400
c,x+11 chia hết cho x-1
d,697:[(15.x-364):x]=17
giúp mik với
a) 3 - (17-x) = -12
b) -26 - (x-7) = 0
c) 25 + (-2+x) = 5
d) 30+ (32-x) = 10
tìm x
a . ( x + 9 ) : ( x + 3 ) = 2
b . ( x + 17 ) : ( x + 2 ) = 4
c ( x + 30 ) : ( x + 1 ) = 2
Tìm x ∈ N sao cho:
a)x ⋮ 15;x ⋮ 20 và 50
b)30⋮ x;45⋮x và x>10
c)9:(x+2)
d)(x+17):(x+3)
tính nhanh
a)a=2/3x5+2/5x7+2/7x9+...+2/37x39
b)(17/28+18.29+19/30+30/31)x(-5/12+1/4+1/6)