tìm x
-16 + 23 + x = - 16
tìm x
-16 + 23 + x = -16
- 16 + 23 + x = - 16
7 + x = - 16
x = - 16 - 7
x = - 23
mk nha
-16 + 23 + x = -16
7 + x = -16
x = (-16) - 7
x = -23
chuk bn hok tốt
-16 + 23 + x = -16
23 + x = -16 - (-16)
23 + x = -16 + 16
23 + x = 0
x = 0 -23
x = -23
tìm số nguyên x biết -16+23+x=-16
-16+23+x=-16
23+x=-16-16
23+x=0
x=0-23
x=-23
-16+23+x=-16
7 + x = - 16
x = - 16 - 7
x = - 23
vậy____
Tìm x € Z biết :
A) 23+x=15
B) x–18=-23
C) x+(-4)=16
D) 25–x=-16
E) (-35).x=-210
F) (-2).(15–x)=60
Lời giải:
a.
$23+x=15$
$x=15-23=-8$
b.
$x-18=-23$
$x=-23+18=-5$
c.
$x+(-4)=16$
$x=16-(-4)=16+4=20$
d.
$25-x=-16$
$x=25-(-16)=25+16=41$
e.
$(-35)x=-210$
$x=(-210):(-35)=6$
f.
$(-2)(15-x)=60$
$15-x=60:(-2)=-30$
$x=15-(-30)=15+30=45$
bài6: Tìm x
-16+23+x=-16
-13.|x|=-26
-16 + 23 + x = -16
23 + x = -16 - (-16)
23 + x = 0
x = 0 - 23
x = -23
-13.|x| = -26
x = -26 :(-13)
x = 2
Tìm x biết
1) -16 + 23 + x = -16
-16 + 23 + x = -16
=> x=-16+16-23
=> x=-23
học tốt
\(-16+23+x=16\)
\(23+x=-16+16
\)
\(23+x=0\)
\(x=0-23\)
\(x=-23\)
\(\text{vậy}\)\(x=-23\)
HỌC TỐT
-16+23+x=-16
=>-16+16+23=-x
=>23=-x
=>x=-23
tìm x , biết :
[ x + 1/2 ] + [ x + 1/4 ] + [ x + 1/8 ] + [ x + 1/16 ] = 23/16
Trả lời
\(\left(x+\frac{1}{2}\right)+\left(x+\frac{1}{4}\right)+\left(x+\frac{1}{8}\right)+\left(x+\frac{1}{16}\right)=\frac{23}{16}\)
\(\Leftrightarrow\left(x+x+x+x\right)+\left(\frac{1}{2}+\frac{1}{4}+\frac{1}{8}+\frac{1}{16}\right)=\frac{23}{16}\)
\(\Leftrightarrow4x+\left(\frac{8}{16}+\frac{4}{16}+\frac{2}{16}+\frac{1}{16}\right)=\frac{23}{16}\)
\(\Leftrightarrow4x+\frac{8+4+2+1}{16}=\frac{23}{16}\)
\(\Leftrightarrow4x+\frac{15}{16}=\frac{23}{16}\)
\(\Leftrightarrow4x=\frac{23}{16}-\frac{15}{16}\)
\(\Leftrightarrow4x=\frac{8}{16}\)
\(\Leftrightarrow4x=\frac{1}{2}\)
\(\Leftrightarrow x=\frac{1}{2}:4\)
\(\Leftrightarrow x=\frac{1}{8}\)
Vậy x=\(\frac{1}{8}\)
\(\left(x+\frac{1}{2}\right)+\left(x+\frac{1}{4}\right)+\left(x+\frac{1}{8}\right)+\left(x+\frac{1}{16}\right)=\frac{23}{16}\)
\(\Leftrightarrow\left(x+x+x+x\right)+\left(\frac{1}{2}+\frac{1}{4}+\frac{1}{8}+\frac{1}{16}\right)=\frac{23}{16}\)
\(\Leftrightarrow4x+\left(\frac{8+4+2+1}{16}\right)=\frac{23}{16}\)
\(\Leftrightarrow4x+\frac{15}{16}=\frac{23}{16}\)
\(\Leftrightarrow4x=\frac{23}{16}-\frac{15}{16}\)
\(\Leftrightarrow4x=\frac{1}{2}\)
\(\Leftrightarrow x=\frac{1}{2}:4\)
\(\Leftrightarrow x=\frac{1}{8}\)
Tìm x
1/ -16 + 23 + x = - 16
2/2x – 35 = 15
1/ Ta có : ( -16 ) + 23 + x = ( -16 )
<=> 23 + x = ( -16 ) + 16
<=> 23 + x = 0
<=> x = 0 -23
<=> x = -23
Vậy x = -23
2/ Ta có : 2.x - 35 = 15
<=> 2.x = 15 + 35
<=> 2.x = 50
<=> x = 50 : 2
<=> x = 25
Vậy x = 25
1/ -16 + 23 + x = -16
[(-16) +23] +x = -16
7 + x = -16
x= -16 - 7
x= -23
2/ 2x - 35 = 15
2x= 15 + 35
2x = 50
x= 50:2
x= 25
Chúc bạn làm bài tốt
1/ Ta có : ( -16 ) + 23 + x = ( -16 )
<=> 23 + x = ( -16 ) + 16
<=> 23 + x = 0
<=> x = 0 -23
<=> x = -23
Vậy x = -23
2/ Ta có : 2.x - 35 = 15
<=> 2.x = 15 + 35
<=> 2.x = 50
<=> x = 50 : 2
<=> x = 25
Vậy x = 25
Tìm x:
x + 2 3 = 3 5 − − 1 6
x + 2 3 = 3 5 − − 1 6 x + 2 3 = 3 5 + 1 6 x + 2 3 = 23 30 x = 23 30 − 2 3 x = 23 − 20 30 x = 1 10
Tìm x ∈ ℕ , biết:
a ) 1 2 + − 1 3 + − 2 3 ≤ x < − 3 5 + 1 6 + − 2 5 + 3 2 b ) − 3 8 + − 18 21 + − 1 7 < x ≤ − 1 6 + 8 17 + 5 − 6 + 9 17 + 1
a ) − 1 2 ≤ x < 2 3 = > x = 0. b ) − 1 < x ≤ 1 = > x ∈ {0;1}
(x+1/2)+(x+1/4)+(x+1/8)+(x+1/16)=23/16
Tìm x?
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