5x.5x+1.5x+2 = 518
⇔53x+3 = 518
⇔3x+3 = 18
⇔3x = 18-3
⇔3x = 15
⇔x = 5
5^x.5^x+1.5^x+2=5^18
=> 5^3x+1+2=5^18
=> 5^3x+3=5^18
=>3x+3=18
=> x=5
vậy....
5x.5x+1.5x+2 <=1000.....00(18 chữ số 0):218
-3 x -7/2=0,8
(3/5-1/5) .75%=(-1/2)
x+5/6=1/18
1) 4x-(2x-5)=21
2) 14x+5=8x+10
3) 15+5x=3x+30
4) 2x-5=15-3x
5) 2(3x+5)+3(x+1)=6x+20
6) 4(x-3)+5(x-3)=18
Tìm x
1) -3-(-x) =5
2)-9-(x-3)=12
3)-10-(x-5)=-5
4)210-(10-x) =110
5)4x-(2x-5)=21
6)14x-5=8x+10
7)15+5x =3x+30
8)2x-5=15-3x
9)2(3x+5)+3(x+1)=x+220
10)4.(x-2+5(x-3)=18
Giúp mik vs
Mik cần gấp
Tìm x:
a) 1 +3+5+7+9+...+(2x+1)=361
b) 2+4+6+...+2x=156
c) 2x.2x+1.2x+2 =100...00:518 {18 chữ số 0}
Tìm x a, 5/8 -x = 7/6 b, 1/6 + 1/5 :x =-7 /18
a)1/3+3/35<x/210<4/7+3/5+1/2
b)5/3+(-14/3)<x<8/5+18/10
Bài 46:
11, - 4|x-2| = -8
12, 5|x+2| = -10(-2)
13, 6|x-2| = 18: (- 3)
14, -7|x+4| = 21 : (-3)
15, 4|x+1| = 8(-2) - 8(-5)
16, 3|x+5| = -9
17, -8|x-3| = 24 - 16: 2
18, -3|x+6| = 6.2 -9
19, 5-|x+7| = 4
20, 12-|x+8| = 10
Giúp mk nha. Mk càn ngay đó
Tìm x
1; 3. ( x - 4) - ( 8 - x) = 12
2; 5. ( x - 6 ) - 2 ( x + 3) = 12
3; 5 - | x + 7| = 4
4; 6. | x - 7 | = 18 : (-3)
