| 24 - x | - 30 = -17
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a,
36 x 40 = (36 x 4) x 10 = 144 x 10 = 1 440
72 x 60 = (72 x 6) x 10 = 432 x 10 = 4 320
89 x 50 = (89 x 5) x 10 = 445 x 10 = 4 450
b,
450 x 70 = (45 x 7) x 100 = 315 x 100 = 31 500
2300 x 500 = (23 x 5) x 10 000 = 115 x 10 000 = 1 150 000
17 000 x 30 = (17 x 3) x 10 000 = 510 000
24 + ( 17 - x) = (125 - 30 ) - 125
24 + ( 17- x ) = (125-125)-30
24+(17-x)=0-30
24+(17-x)= -30
17-x= -30-24
17-x= -54
-x= -54-17
-x= -71
x=71
Vậy x=71
Học tốt
HAPPY NEW YEAR!!!!!!!!!!!
\(24+\left(17-x\right)=125-30-125\)
\(\Rightarrow41-x=-30\)
\(\Rightarrow x=41+30=71\)
a: -26-(x-7)=0
=>x-7=-26
=>x=-26+7=-19
b: \(24-\left(30+x\right)=-7\)
=>\(30+x=24-\left(-7\right)\)
=>\(x+30=24+7=31\)
=>x=31-30=1
c: \(3-\left(17-x\right)=-12\)
=>\(17-x=3-\left(-12\right)\)
=>\(17-x=3+12=15\)
=>x=17-15=2
d: \(\left(5-x\right)-7=-15\)
=>\(5-x=-15+7=-8\)
=>\(x=5-\left(-8\right)=5+8=13\)
194 - ( 3 x \(x\) - 9 x 17 ) + 24 : 3 = 30
194 - ( 3 x \(x\) - 9 x 17 ) + 8 = 30
194 - ( 3 x \(x\) - 9 x 17 ) = 30 - 8
194 - ( 3 x \(x\) - 9 x 17 ) = 22
3 x \(x\) - 153 = 194 - 22
3 x \(x\) - 153 = 172
3 x \(x\) = 172 + 153
3 x \(x\) = 325
\(x\) = 325 : 3
\(x\) = 108,33
194 - ( 3 x X - 9 x 17 ) + 24 : 3 + 30
đề sai 1000000%
194-(3*x-9*17)=30-24/3
194-(3*x-9*17)=22
3*x-9*17=194-22
3*x-9*17=171
3*x=171+9*17
3*x=171+153
3*x=324
x=324/3
x=108
Vậy x=108
a: =>5-x=-23
=>x=5+23=28
b: =>x-3-x+7-25+x=54
=>x-21=54
=>x=75
c: =>7-9x-2x+4=-5x-35+27-25=-5x-37
=>-11x+3=-5x-37
=>-6x=-40
=>x=20/3
a.
10-x-5 = (-5) - 7 -11
=>5-x = 0
=>x=5
b
(x-3) - (x+17-24) - (25-x) = 24 - (-30)
=>x - 3 - x - 17 + 24 - 25 - x = 24 + 30
=>-x - 21 = 54
=>-x = 75
=>x = -75
c
(7 - 9x) - (2x - 4) = - (5x + 35) - (-27) - 25
=>7-9x - 2x + 4 = -5x - 35 + 27 - 35
=>11 - 11x + 5x = -43
=>16x = 11 + 43
=>16x = 54
=>x=4
Câu 1: \(\frac{17}{51}\)x \(\frac{45}{30}\)= \(\frac{1}{3}\)x \(\frac{3}{2}\)
= \(\frac{1}{2}\).
Câu 2: \(\frac{24}{15}\)x \(\frac{56}{72}\)x \(\frac{10}{14}\)= \(\frac{8}{5}\)x \(\frac{7}{9}\)x \(\frac{5}{7}\)
= \(\frac{56}{45}\)x \(\frac{5}{7}\)
= \(\frac{8}{9}\)
Câu 3: \(\frac{32}{48}\times\frac{35}{21}\times\frac{63}{14}\times\frac{9}{30}=\frac{2}{3}\times\frac{5}{3}\times\frac{9}{2}\times\frac{3}{10}=\frac{3}{2}\)
k nha
a)17/51x45/40=1/3x3/2=3/6=1/2
b)24/15x56/72x10/14=8/5x7/9x5/7=8/9
c)32/48x35/21x63/14x9/30=2/3x5/3x9/2x3/10=3/2
b. \(\dfrac{4.2.3.5.2.6.2.5.3}{4.3.4.5.6.4.5.6}=\dfrac{1}{4}\)
c. \(\dfrac{17.2.101.2005}{17.2.101.2.2005}=\dfrac{1}{2}\)
d. \(\dfrac{2.3.4.2.11.13.17}{3.11.4.4.17.13.2}=\dfrac{1}{2}\)
a)\(\dfrac{4\times6\times10\times12\times15}{4\times12\times5\times24\times30}=\dfrac{2}{2\times2\times2}=\dfrac{2}{8}=\dfrac{1}{4}\)
b)\(\dfrac{34\times101\times2005}{17\times202\times4010}=\dfrac{2}{2\times2}=\dfrac{2}{4}=\dfrac{1}{2}\)
c)\(\dfrac{6\times8\times11\times13\times17}{33\times16\times17\times26}=\dfrac{6}{3\times2\times2}=\dfrac{1}{2}\)
Trl:
\(\left|24-x\right|-30=-17\)
\(\Rightarrow\left|24-x\right|=-17+30\)
\(\Rightarrow\left|24-x\right|=13\)
\(\Rightarrow\orbr{\begin{cases}24-x=13\\24-x=-13\end{cases}\Rightarrow\orbr{\begin{cases}x=24-13\\x=24-\left(-13\right)\end{cases}}}\Rightarrow\orbr{\begin{cases}x=11\\x=37\end{cases}}\)
Vậy \(x\in\left\{11;37\right\}\)
Xét 2 TH :
Th1 : \(x>25\) thì ta có :
\(\left(x-24\right)-30=-17\)
\(\Leftrightarrow x=37\) ( chọn )
Th 2 : \(x\le24\) thì ta có :
\(\left(24-x\right)-30=-17\)
\(\Leftrightarrow x=11\) ( chọn )
Vậy : \(x\in\left\{11,37\right\}\)