Tìm x: x 52 ¯ + 13 x ¯ = 384
Tìm x biết (7-x)+(10-x)+(13-x)+....+(52-x)+(55-x)=493
(7 - x) + (10 -x) + (13 - x) + ... + (52 - x) + (55 - x) = 493
<=>7+10+13+...+55-17x=493
<=>(55+7).17:2 - 17x=493
<=>527-17x=493
<=>x=2
Tìm X :
14 x X + 25 x X - 13 x X = 52
14 x X + 25 x X - 13 x X = 52
X x ( 14 + 25 - 13 ) = 52
X x 26 = 52
X = 52 : 26
X = 2
X x (14 + 25 - 13) = 52
X x 26 = 52
X = 52 : 26
X = 2
Chúc em học tốt <3
14 x X + 25 x X- 13 x X=52
X x ( 14+25-13) =52
X x 26=52
X=52:26
X=2
Tìm giá trị của x với máy tính casio fx-570ES PLUS
Tìm x biết
-x/13 = -52/x
=> x2 = -52.-13 = 676
=> x = 26
Tìm x :
x/13:15/16=46/52
\(\frac{x}{13}:\frac{15}{16}=\frac{46}{52}\)
\(\Rightarrow\frac{x}{13}=\frac{46}{52}\cdot\frac{15}{16}=\frac{23}{26}\cdot\frac{15}{16}\)
\(\Rightarrow\frac{x}{13}=\frac{345}{416}\)
\(\Rightarrow x=\frac{345}{416}\cdot13=\frac{345}{32}\)
Vậy \(x=\frac{345}{32}\)
K MK ĐI. ~ HỌC TỐT NHA ~
\(\frac{x}{13}:\frac{15}{16}=\frac{46}{52}\)
\(\Rightarrow\frac{x}{13}:\frac{15}{16}=\frac{23}{26}\)
\(\Rightarrow\frac{x}{13}=\frac{23}{26}\times\frac{15}{16}\)
\(\Rightarrow\frac{x}{13}=\frac{345}{416}\)
\(\Leftrightarrow416\times x=13\times345\)
\(\Rightarrow416\times x=4485\)
\(\Rightarrow x=4485:416\)
\(\Rightarrow x=\frac{345}{32}\)
\(\frac{x}{13}\div\frac{15}{16}=\frac{46}{52}\)
\(\Rightarrow\frac{x}{13}\div\frac{15}{16}=\frac{23}{26}\)
\(\Rightarrow x\div13=\frac{345}{416}\)
\(\Rightarrow x=\frac{345}{52}\)
~Study well~
#Thạc_Trân
Tìm x:
x/13 + 15/26 = 46/52.
x/13+15/26=46/52
=> x/13= 46/52-15/26
=> x/13=4/13
=> x=4
x/3 + 15/26 = 46/52
x/13 + 15/26 = 23/26
x/13 = 23/26 - 15/26
x/13 = 4/13
Có x/13 = 4/13
Suy ra : x = 4
Vậy x = 4
x/13 + 15/26 = 46/52
x/13 = 46/52 - 15/26
x/13 = 4/13
=> x = 4
day la cach lam don gian va de hieu nhat
Cho A = 24 + 15 + 52 + x,x ∈ N. Tìm điều kiện của x để A không chia hết cho 13
A. x chia hết cho 13.
B. x=11k.
C. x chia hết cho 9.
D. x không chia hết cho 13
a) Tìm x: x + 3 7 = 2 5 + 3 10
b) Tính giá trị biểu thức: 1 4 + 5 2 × 1 3 = . . . . . .
Bài 1: Tìm x nguyên, biết:
a) x + 5 = 20 - (12 -7)
b)15 - (3+ 2x) = 22
c) -11 - (19 - x) = 50
d)159 - (25 - x) = 43
e) (79 - x) - 43 = - (17 - 52)
f) (7 + x) - (21 - 13) = 32
g) - x + 20 = (-15) + 8 + 13
h) - (-x + 13 -142) + 18 = 55
Xin cảm ơn!
a) \(x+5=20-\left(12-7\right)\)
\(\Rightarrow x+5=20-5\)
\(\Rightarrow x+5=15\)
\(\Rightarrow x=15-5\)
\(\Rightarrow x=10\)
b) \(15-\left(3+2x\right)=2^2\)
\(\Rightarrow3+2x=15-4\)
\(\Rightarrow3+2x=11\)
\(\Rightarrow2x=11-3\)
\(\Rightarrow2x=8\)
\(\Rightarrow x=\dfrac{8}{2}\)
\(\Rightarrow x=4\)
c) \(-11-\left(19-x\right)=50\)
\(\Rightarrow19-x=-11-50\)
\(\Rightarrow19-x=-61\)
\(\Rightarrow x=61+19\)
\(\Rightarrow x=80\)
d) \(159-\left(25-x\right)=43\)
\(\Rightarrow25-x=159-43\)
\(\Rightarrow25-x=116\)
\(\Rightarrow x=25-116\)
\(\Rightarrow x=-91\)
e) \(\left(79-x\right)-43=-\left(17-52\right)\)
\(\Rightarrow\left(79-x\right)-43=52-17\)
\(\Rightarrow79-x-43=35\)
\(\Rightarrow36-x=35\)
\(\Rightarrow x=1\)
f) \(\left(7+x\right)-\left(21-13\right)=32\)
\(\Rightarrow7+x-8=32\)
\(\Rightarrow x-1=32\)
\(\Rightarrow x=32+1\)
\(\Rightarrow x=33\)
g) \(-x+20=-15+8+13\)
\(\Rightarrow-x+20=6\)
\(\Rightarrow x=20-6\)
\(\Rightarrow x=14\)
h) \(-\left(-x+13-142\right)+18=55\)
\(\Rightarrow x-13+142+18=55\)
\(\Rightarrow x+147=55\)
\(\Rightarrow x=55-147\)
\(\Rightarrow x=-92\)
Tìm x: x – 384 = 12689
A. 17303
. B. 13073
C. 13703
D. 17033
tìm x thuộc Z
a) 30(x+2)-6(x-5)-24x=100
b)/2x-5/=13
c)52-/x/=80
b) /2x-5/=13
=>2x-5=13 hoặc -13
TH1: 2x-5=13 | TH2:2x-5=-13 |
2x=13+5=>2x=18 | 2x=-13+5=>2x=-8 |
x=18:2=>x=9 | x=-8:2=>x=4 |