1602 : x = 7,2
x = ?
7,2x-15,5=X
7,2x-15,5=x
7,2x-x=15,5
6,2x=15,5
x=15,5:6,2
x=2,5
vậy x=2,5
THE END
a)7,2x+(−3,7.x)−2,7=7,8
\(\Rightarrow3,5x=7,8+2,7=10,5\\ \Rightarrow x=\dfrac{10,5}{3,5}=3\)
(7,2-3,7).x=7,8+2,7
3,5.x= 10,5
x=10,5:3,5
x=3
tính nhanh : 7,2x 111 x 3,6 x 2 + 1,8 x 4 x 999
Tìm x, biết
a)7,2x+(−3,7.x)−2,7=7,8
b) 3.(x−12)−5(x+35)=−x+15
b: \(\Leftrightarrow3x-36-5x-175+x-15=0\)
\(\Leftrightarrow-x-226=0\)
hay x=-226
x + 3,07 + 1,28 = 7,2
x - 17,7 - 12,3 = 42,5
các bạn giải chi tiết giúp mình với
Tìm x :
x + 20% x x = 7,2
x x 4 + 1/2 x x = 55,35
40% x x +x x 20% = 72
x - 20% x x = 216
a) X + 20% x X = 7,2
<=> X x ( 1+ 20%) = 7,2
<=> X x 6/5 = 7,2
<=> X = 6
b) X x 4 + 1/2 x X = 55,35
<=> X x ( 4+ 1/2) = 55,35
<=> X x 4,5 = 55,35
<=> X = 12,3
c) 40% x X + X x 20% = 72
<=> X x ( 40% + 20%) = 72
<=> X x 60% = 72
<=> X x 3/5 = 72
<=> X = 120
d) X - 20% x X = 216
<=> X x ( 1 - 20%) = 216
<=> X x 4/5 = 216
<=> X = 270
tìm x
1602÷x= 7,2
1602 : x = 7.2
x = 1602 : 7.2
x = 222.5
k nha
thanks
1602:x=7,2
x=1602:7,2
x=222,5
mik xong đầu nhé
1602 : x = 7,2
x = 1602 : 7,2
x = 222,5
Tìm x
a/
x+65,27=72,6
b/
x-43,502=21,73
c/
x.6,3=187
d/
1602:x=7,2
a/ x+65,27=72,6
x=72,6-65,27
x=7,33
b/x-43,502=21,73
x=21,73+43,502
x=65,232
c/x.6,3=187
x=187:6,3
x=29,682....
d/ 1602:x=7,2
x=1602:7,2
x=222,5
\(X+65,27=72,6\\ X=72,6-65,27=7,33\\ ---\\ X-43,502=21,73\\ X=21,73+43,502=65,232\\ ---\\ X.6,3=187\\ X=\dfrac{187}{6,3}=\dfrac{1870}{63}\\ ---\\ 1602:X=7,2\\ X=1602:7,2=222,5\)
6x-7,2x=-14,4
x(6-7,2)=-14,4
x.(-1,2)=-14,4
x=-14,4:-1,2
x=12