8|2-x|= 9-3 8|2-x|= 6 |2-x|= 6:8 |2-x|=3/4 TH1: 2-x= 3/4 x=2-3/4 x=5/4 TH2: 2-x=-3/4 x=2-(-3/4) x=7/4 Vậy xϵ{5/4; 7/4}
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Ôn tập chương 1
Các câu hỏi tương tự
\(\dfrac{x+4}{8}+\dfrac{x+3}{9}=\dfrac{x+2}{10}+\dfrac{x+1}{11}\)
a,2^12.3^54^6.81/(2^2.3)^6+8^4.3^5
b, 4.(-1/2)^3-2.(-1/2)^2+3.(-1/2)+1
c, 5x-7=3x+9
d, 5x-|9-7x|=3
e, -5+|3x-1|+6=|-4|
g, (x-1)^2=(x-1)^4
h, 5^-1.25=125
i, |x+1|+|x+2|+|x+3|=4x
Giúp với, tìm các số nguyên x biết:
\(\dfrac{1}{4}+\dfrac{8}{9}\le\dfrac{x}{36}< 1-\left(\dfrac{3}{8}-\dfrac{5}{6}\right)\)
LL
9 tháng 12 2021 lúc 18:59
B1 : Tìm x,y
a) \(\dfrac{x}{-15}=\dfrac{60}{x}\)
b)\(\dfrac{-2}{x}=\dfrac{-x}{\dfrac{8}{25}}\)
c)\(\dfrac{37-x}{x+13}=\dfrac{3}{7}\)
d) \(\dfrac{x}{2}=\dfrac{y}{5}=xy=10\)
Giúp tui đi :< Tui tick
Tìm x:
1) -3.(1-2x) - 4.(1+3x) = -5x + 5
2) 3.(2x - 5) - 6.(1 - 4x) = -3x + 7
3) (1 - 3x) - 2.(3x - 6) = -4x - 5
4) x.(4x - 3) - 2x.(2x - 1) = 5x - 7
5) 3x.(2x - 1) - 6x.(x + 2) = -3x + 4
6) (1 - 2x).3 - 4.(6x - 1) = 7x - 5
7) 6x - 3.(1 - 4x) - 5.(x + 1) = 2x + 7
8) 6.(1 - 3x) - 3.(2x + 5) = -10x + 7
9) 3x.(1 - 2x) + 6x^2 - 7x = 8.(1 - 2x) - 9
10) 2x.(1 + 3x) - 3x.(4 + 2x) = 3x - 4
tìm x biết
1) dfrac{2}{3}+dfrac{1}{3}:xdfrac{3}{5}
2) left(dfrac{2x}{3}-3right):left(-10right)dfrac{2}{5}
3) 2dfrac{2}{3}:x2dfrac{1}{12}:left(-0,06right)
4) dfrac{3}{7}+dfrac{1}{7}:xdfrac{3}{14}
5) -dfrac{3}{5}.x-dfrac{1}{2}-dfrac{1}{7}
6) dfrac{1}{5}+2x-2dfrac{1}{4}
7)-dfrac{1}{2}:xdfrac{3}{8}:dfrac{9}{16}
8)dfrac{2}{3}:x2dfrac{1}{2}:left(-0,3right)
9) dfrac{x}{3}dfrac{-2}{1,5}
Đọc tiếp
tìm x biết
1) \(\dfrac{2}{3}+\dfrac{1}{3}:x=\dfrac{3}{5}\)
2) \(\left(\dfrac{2x}{3}-3\right):\left(-10\right)=\dfrac{2}{5}\)
3) \(2\dfrac{2}{3}:x=2\dfrac{1}{12}:\left(-0,06\right)\)
4) \(\dfrac{3}{7}+\dfrac{1}{7}:x=\dfrac{3}{14}\)
5) \(-\dfrac{3}{5}.x-\dfrac{1}{2}=-\dfrac{1}{7}\)
6) \(\dfrac{1}{5}+2x=-2\dfrac{1}{4}\)
7)\(-\dfrac{1}{2}:x=\dfrac{3}{8}:\dfrac{9}{16}\)
8)\(\dfrac{2}{3}:x=2\dfrac{1}{2}:\left(-0,3\right)\)
9) \(\dfrac{x}{3}=\dfrac{-2}{1,5}\)
√36/16*x-2/3 giúp mình với
giúp vs mai nộp rồi
Bài 1.
a) -x+8=-17
b) 35-x=37
c) x-45=-17
d) |x+1|=20
e) |x-3|-16=-4
Bài 2.
a) (144-97)-144
b) (-145)-(18-145)
c) (27+514)-(486-73
d) (38-29+43)-(43+38)
Mn giúp mk với, mk đag gấp lắm
Tìm x,y biết:
\(\dfrac{x-1}{2}=\dfrac{2y-3}{5}\)và 5x-6y=-16