x + x *2.7 + x * 6.3 =120
7) Tìm x
x+x*2.7+x*6.3 = 120
x+x*2.7+x*6.3 = 120
x+x*(2.7+6.3) = 120
x+x*10 = 120
x = 120: 10
x=12
x(1+2,7+6,3)=120
x*10=120
x=12 nha bạn .
x+x*2,7+x*6.3=120 . tìm x
x+x*2,7+x*6,3=120
x(1+ 2,7 + 6,3) = 120
x* 10 = 120
x= 12
tìm x biết
\(\frac{-9}{x}=\frac{-x}{\frac{4}{49}}\)
-7.2.x+3.7.x+2.7=-7.8
\(3^{-1}.3^x+6.3^{x-1}=7.3^6\)
\(25< 5^x:5< 625\)
Tìm X là số tự nhiên
2.5 x 2.7 < X x 2 < 2.7 x4.5
2,5 x 2,7 < X x 2 < 2,7 x 4,5
6,75 < X x 2 < 12,15
=> x = 4 ; 5 , 6
2,3 x 2,7 < X x 2 < 2,7 x 4,5
6,75 < X x 2 < 12,15
=> x = 4 ; 5 ; 6
6.3 x 6.4 + 3.6 x 6.3 = .............
A. 63
B.39
C.36
D.46
19.5 - X x 6.3 = 11.625
=> x.6,3 = 19,5 - 11,625
=> x.6,3 = 7,875
=> x = 7,875 : 6,3
=> x = 1,25
Vậy x = 1,25
19.5 - X x 6.3 = 11.625
6.3x X - 19.5 = 11.625
6.3x X =19.5 -11.625
6.3x X =7.875
X = 7.875 : 6.3
X =1.25
thử lại :19.5 -1.25 x 6.3 =11.625
tìm x
\(^{5^2.7^3.11^2.x-5^2.7^2.11^4=0}\)
Ta có: 52.73.112.x - 52.72.114 = 0
=> 52.72.112(7x - 112) = 0
=> 7x - 121 = 0
=> 7x = 121
=> x = 121 : 7
=> x = 121/7
bai 1, tim x, biet
a, (-x+31)-39=-69 b, -120-(-30-x)=-50 c, /x/ -5=-1 d, /x+2/-12=-1
e, \(\left(3x-2^4\right).7^3=2.7^5\)
giup minh voi minh can gap, cam on cac ban nhieu
a)(-x+31)-39=-69 b)-120-(-30-x)=-50
-x+31=-69+39 -30-x=-120-(-50)
-x+31=-30 -30-x=-70
-1*x=-30-31 x=-30-(-70)
x=-61:(-1) x=40
x=61
c)/x/-5=-1
/x/=-1+5
/x/=4
Vậy x=4 hoặc x=-4
d)/x+2/-12=-1
/x+2/=-1+12
/x+2/=11
Trường hợp 1: x+2=11
x=11-2
x=9
Trường hợp 2: x+2=-11
x=-11-2
x=-13
e)(3x-24).73=2.75
3x-16=2.75:73
3x-16=2.72
3x-16=98
3x=98+16
3x=114
x=114:3
x=38
tìm x : x.(1/5+1/4) - ( 1/7+1/8 ) = 0
b 5^2.7^3.11^2+5^2.7^2.11 = 0