! 3 + x ! = 20 : 5
! 3 + x ! = 4
=> 3 + x = 4 hay 3 + x = -4
x = 4 - 3 hay x = -4 - 3
x = 1 hay x = -7
| \(3+x\)|\(=20:5\)
|\(3+x\)| \(=4\)
\(\Rightarrow3+x=4hay3+x=4\)
\(x=4-3hay\)\(x=-4-3\)
\(x=1hay\)\(x=-4+3\)
\(hay\)\(x=-7\)
! 3 + x ! = 20 : 5
! 3 + x ! = 4
=> 3 + x = 4 hay 3 + x = -4
x = 4 - 3 hay x = -4 - 3
x = 1 hay x = -7
| \(3+x\)|\(=20:5\)
|\(3+x\)| \(=4\)
\(\Rightarrow3+x=4hay3+x=4\)
\(x=4-3hay\)\(x=-4-3\)
\(x=1hay\)\(x=-4+3\)
\(hay\)\(x=-7\)
1. (627- 138) : ( 3 x X :2) = 163
2. (X-1)x3+ 3/20 +3/13+3/2015/5+5/20+5/13+5/20+5/2015
1) 2³ .x -5² x = 2( 5² + 2² ) -33. 2) 15÷ ( x +2) = (3³ +3) ÷1
3) 20÷ (x +1) = (5² +1 ) ÷13. 4) 320÷ ( x -1 ) = (5³ - 5² ) ÷4 +15
5) 240 ÷ ( x -5 ) = 2² .5² -20. 6) 70 ÷ ( x -3) = ( 3⁴ -1) ÷ 4 - 10
Giúp mình với mình Tối nay mình đi học rồi
x.3+3/20+3/15+3/2015/5+5/20+5/13+5/2015
a) 1/2 : x -5/6 = - 2/3 b) 20%. x + 5/8 - x . 0 ,5= 11/20
\(\dfrac{3}{20}\)x\(\dfrac{7}{16}\)+\(\dfrac{3}{20}\)x\(\dfrac{5}{16}\)+\(\dfrac{3}{20}\)\(\dfrac{3}{10}\)
tìm x biết : x+\(\frac{3+\frac{3}{20}+\frac{3}{13}+\frac{3}{2013}}{5+\frac{5}{20}+\frac{5}{13}+\frac{5}{2013}}\)
bài 4 : tìm x
a, 15 +25 :(2x-1)=20 b, 3\(^{^{ }x-1}\)+2.3\(^x\)=21 c, 2\(^{x-3}\)+2\(^{x+1}\)=17
d, 5\(^x\)-5\(^{x-1}\)=20
a) ( 320 x 4 + 320 x 5) : 321
B) (520 x 4 + 520 x 7 - 517
Giải giúp em vs ạ, em đg cần gấp
tìm x biết
a, -12 ( x - 5 ) + 7 ( 3 - x ) = 2015
b, 20 ( x - 4 ) - 5 ( x + 3 ) - 15x = 20
c, I 2x - 5 I = 13
d, ( x + 3) ( x - 7 ) < 0
Tìm x
a, 2x- (-1) = 3
b, (x + 1) -5 = -3
c, 5 - (x - 2) = 4
d, 10 + (x - 3 ) = 5
e, 15 - x = -12
g, 20 + ( -x ) = 30
h, x - 10 = -20
i, x + 20 = -5