Tìm x: x- 15 / 5 = 24
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tìm số nguyên x biết:
a)x - 5= -1
b)x +30= - 4
c)x -(-24)=3
d) 22 -( - x)=
e) ( x + 5) +(x - 9)= x+ 2
f) (27 - x) + (15 + x) = x - 24
a)\(x-5=-1\)
⇔\(x=4\)
b)\(x+30=-4\)
⇔\(x=-34\)
c)\(x-\left(-24\right)=3\)
⇔\(x+24=3\)
⇔\(x=-21\)
e)\(\left(x+5\right)+\left(x-9\right)=x+2\)
⇔\(x+5+x-9-x-2=0\)
⇔\(x-6=0\)
⇔\(x=6\)
f)\(\left(27-x\right)+\left(15+x\right)=x-24\)
⇔\(27-x+15+x-x+24=0\)
⇔\(66-x=0\)
⇔\(x=66\)
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\(a.x-5=-1\) \(b.x+30=-4\)
\(x=\left(-1\right)+5\) \(x=\left(-4\right)-30\)
\(x=4\) \(x=-34\)
\(c.x-\left(-24\right)=3\) \(e.\left(x+5\right)+\left(x-9\right)=x+2\)
\(x=3+\left(-24\right)\) \(x+5+x-9=x+2\)
\(x=-21\) \(2x-4=x+2\)
\(2x-x=2+4\)
\(x=6\)
\(f.\left(27-x\right)+\left(15+x\right)=x-24\)
\(27-x+15+x=x-24\)
\(27+15=x-24\)
\(42=x-24\)
\(x=24+42\)
\(x=66\)
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Tìm x, biết: a) x = 1/4 + 5/13 b) x/3 = 2/3 + -1/7 c) x/3 = 16/24 + 24/ 36
d) x/15 = 1/5 + 2/3
\(a)x=\dfrac{1}{4}+\dfrac{5}{13}=\dfrac{33}{52}.\\ b)\dfrac{x}{3}=\dfrac{2}{3}+\dfrac{-1}{7}.\\ \Leftrightarrow\dfrac{x}{3}=\dfrac{11}{21}.\\ \Leftrightarrow\dfrac{7x}{21}=\dfrac{11}{21}.\\ \Rightarrow7x=11.\\ \Leftrightarrow x=\dfrac{11}{7}.\\ c)\dfrac{x}{3}=\dfrac{16}{24}+\dfrac{24}{36}=\dfrac{2}{3}+\dfrac{2}{3}=\dfrac{4}{3}.\\ \Rightarrow x=4.\\ d)\dfrac{x}{15}=\dfrac{1}{5}+\dfrac{2}{3}=\dfrac{13}{15}.\\ \Rightarrow x=13.\)
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tìm x biết : (x-15):5+22-24
Ix+7l=15-(-4)
TÌm x:
(x-15):5+22=24
245 mik ko chắc lắm
nếu đúng thì cho 1 tk nha
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( x - 15 ) : 5 + 22 = 24
( x - 15 ) : 5 = 2
( x - 15 ) = 2 . 5
( x - 15 ) = 10
x = 25
Vậy ....
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( x - 15 ) : 5 + 22 = 24
( x - 15 ) : 5 = 24 - 22
( x - 15 ) : 5 = 2
x - 15 = 2 x 5
x - 15 = 10
x = 10 + 15
x = 25
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Tìm x
a) -24 - (-15+x) = -36
b) 24 - (x-5)2 = -57
, -24-(-15+x)=-36. =>-24-(-36)=-15+x. =>12=-15+x => x=12--15 => x=27
24-(x-5)^2=-57. => (x-5)^2=24-(-57). => (x-5)^2=81 =>x-5=9 => x=14
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Tìm x biết:
a, (x + 15)÷8 = 7
b, (x - 23)÷8 = 12
c, 24 = (x + 5)÷5
d, (x - 8)÷7 = 11
tìm X biết:
a,-7.(5-X)-2.(X-10)=15
b,10.(X-7)-8.(X+5)=6.(-5)+24
a -7.(5-x) -2.(x-10)=15
= -35+7x-2x+20=15=5x=30
5x=30
x=6
b 10.(x-7)-8.(x+5)=6.(-5)+24
=10x-70-8x-40= -30+24
=10x-8x = -30+24+70+40
2x = 104
x = 104:2
x = 52
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\(a)-7\left(5-x\right)-2\left(x-10\right)=15\)
\(\Rightarrow-35+7x-2x+20=15\)
\(\Rightarrow-35+20+7x-2x=15\)
\(\Rightarrow-15+5x=15\)
\(\Rightarrow5x=30\Rightarrow x=6\)
\(b)10\left(x-7\right)-8\left(x+5\right)=6\left(-5\right)+24\)
\(\Rightarrow10x-70-8x-40=-30+24\)
\(\Rightarrow10x-8x-70-40=-6\)
\(\Rightarrow2x-110=-6\)
\(\Rightarrow2x=104\Rightarrow x=52\)
Vậy\(a)x=6b)x=52\)
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Tìm X biết:
a,-7.(5-X)-2(X-10)=15
b,10(X-7)-8(X+5)=6(-5)+24
Tìm x:
e) (x+5) + (x-9) = x+2
f) (27-x) + ( 15+x) = x-24
e) (x+5) + (x-9) = x+2
x+5 + x -9 = x+2
2x + 5 - 9 = x+2
2x - 4 = x +2
3x = 2 +4
3x =6
x = 2
f) (27-x) + ( 15+x) = x-24
27-x + 15 +x = x-24
27 + 15 - (x - x) = x - 24
42 = x-24
x = 24 + 42
x = 66