x + 12 - 6 = 19
24/-36 x 12/19 - 4/6 x 7/19 + 2022 mũ 0
\(=\dfrac{-2}{3}\cdot\dfrac{12}{19}-\dfrac{2}{3}\cdot\dfrac{7}{19}+1\)
=-2/3(12/19+7/19)+1
=1-2/3
=1/3
5/6 x 4/19 + 7/12 x 4/19 + 18/19
Giúp vs
5/6 x 4/19 + 7/12 x 4/19 + 18/19
=(5/6+7/12)×(4/19+18/19)
= 17/12×22/19
= 187/114
Mn ơi giải giúp mình pt này vs :
\(19+3x+4\sqrt{-x^2-x-6}=6\sqrt{2-x}+12\sqrt{2-x}+12\sqrt{x+3}\)
*Thực hiện
1/ (\(\dfrac{2021}{2020}\)+\(\dfrac{2020}{2021}\)) x (\(\dfrac{1}{2}\)-\(\dfrac{1}{3}\)-\(\dfrac{1}{6}\))
2/ (\(\dfrac{7}{19}\)-\(\dfrac{5}{12}\)):\(\dfrac{-5}{8}\)-(\(\dfrac{7}{19}\)-\(\dfrac{29}{12}\)):\(\dfrac{5}{8}\)
3/ \(\dfrac{-5}{6}\)x\(\dfrac{7}{24}\)-\(\dfrac{5}{6}\)x\(\dfrac{14}{24}\)-\(\dfrac{5}{6}\)x\(\dfrac{3}{24}\)
1/ \(\left(\dfrac{2021}{2020}+\dfrac{2020}{2021}\right).\left(\dfrac{1}{2}-\dfrac{1}{3}-\dfrac{1}{6}\right)\)
=\(\left(\dfrac{2021}{2020}+\dfrac{2020}{2021}\right).0\)
=\(0\)
mink chịu bài này nó rất khó
Tìm số nguyên x biết: a) x + 12 = 4; b) 19 - x = 0; c) 2x - 4 = -12;d) 2x- (-2) = 6
a)x=4-12=-8
b)x=19-0=19
c)x=-12+4:2=-4
d)x=6+(-2):2=2
a,-8/3+7/5+-71/15<x<-13/7+19/14+-7/2
b,-19/6+-15/2+11/3<x<-5/4+19/12+-10/3
c,-6/7+3/35<x<-2/5+3/7
d,x=3/4+1/-12
e,x/14=1/7+-3/14
f,11/18+13/6=85/x
g,8/17+5/17<x/17<6/17+9/17
Tính
a) 11/12 x 9/19 - 22/24 x 6/19 + 11/12 x 16/19.
b) 2022 x 2021 - 2/ 2020 +2020 x 2022.
Cần gấp tick người nhanh và chính xác nhất!
a) 11/12 x 9/19 - 22/24 x 6/19 + 11/12 x 16/19.
= 11/12 x 9/19 - 11/12 x 6/19 + 11/12 x 16/19.
=11/12 x ( 9/19 -6/19 + 16/19)
=11/12x 1
=11/12
mình biết câu a/ thôi
nhìu số quá khó ko biết làm ;-;
Tìm số nguyên x biết:
1, -x +(-53) =(-42) - 41
2. -12 - x= -32 +19
3.453+x = -443+(-199)
4. -12-x = -32 +19
5. 32.(-2) +x = -120 -5.(-85)
6. -2x + 15.(-4) = 21.(-8) -12
x - 240 : 12 = 8 ; b, 19 + 225 : (6-x) = 64 ; 2 mũ x + 5.2 mũ x+2
a: x-240:12=8
=>x-20=8
=>x=28
b: \(19+\dfrac{225}{6-x}=64\)
=>\(\dfrac{225}{6-x}=45\)
=>6-x=5
=>x=1
c: Đề thiếu rồi bạn
\(X-240:12=8\\ X-20=8\\ X=8+20=28\\ ---\\ 19+225:\left(6-X\right)=64\\ 225:\left(6-X\right)=64-19=45\\ 6-X=225:45=5\\ X=6-5=1\)