-0,4x -0,5x-0,8
a/ (0,4x - 2) - (1,5x +1) -(-4x-0,8)=3,6
Tìm x biết :
a/ (0,4x - 2) - (1,5x +1) -(-4x-0,8)=3,6
a) \(\left(\frac{2}{5}x-2\right)-\left(\frac{3}{2}x+1\right)-\left(-4x-\frac{4}{5}\right)=\)\(\frac{18}{5}\)
\(\frac{2}{5}x-2-\frac{3}{2}x-1-4x+\frac{4}{5}=\frac{18}{5}\)
\(\frac{2}{5}x-\frac{3}{2}x-4x=\frac{18}{5}+2+1-\frac{4}{5}\)
\(\frac{8}{20}x-\frac{30}{20}x-\frac{80}{20}x=\frac{14}{5}+3\)
\(\frac{-51}{10}x=\frac{14}{5}+\frac{15}{5}\)
\(\frac{-51}{10}x=\frac{29}{5}\)
\(x=\frac{29}{5}.\frac{-10}{51}\)
\(x=\frac{-58}{51}\)
vậy \(x=\frac{-58}{51}\)
Tìm x biết
(0,4x-x) - (4,5x+1) - (-4x-0,8) =3,6
-0.6x-4.5x-1+4x+0.8=3.6
x(-0.6-4.5+4)+(-1+0.8)=3.6
-0.1x-0.2 =3.6
-0.1x =3.6+0.2
-0.1x =3.8
x =3.8/(-0.1)
x =-38
\(\left(0,4x-2\right)-\left(1,5x+1\right)-\left(-4x-0,8\right)=3,6\)
tìm x nha
\(\left(0,4x-2\right)-\left(1,5x+1\right)-\left(-4x-0,8\right)=3,6\)
\(0,4x-2-1,5x-1+4x+0,8=3,6\)
\(2,9x-2,2=3,6\)
\(2,9x=5,8\)
\(x=2\)
(0,4x - 2) - (1,5x + 1) - (-4x - 0,8)=3,6
<=>0,4x - 2 - 1,5x -1 +4x +0,8 = 3,6
<=>2,9x - 2,2 =3,6
<=> 2,9x = 5.8
<=> x= 2
đúng hay sai : với x>0,2 và y>0,25 thì 5 I 0,1 - 0,5x I - I 0,8 + 3,2y I = 2,5x - 3,2y - 1,3
Giải các phương trình sau:
a) 1,2 – (x – 0,8) = –2(0,9 + x)
b) 3,6 – 0,5(2x + 1) = x – 0,25(2 – 4x)
c) 2,3x – 2(0,7 + 2x) = 3,6 – 1,7x
d) 0,1 – 2(0,5t – 0,1) = 2(t – 2,5) – 0,7
e) 3 + 2,25x +2,6 = 2x + 5 + 0,4x
f) 5x + 3,48 – 2,35x = 5,38 – 2,9x + 10,42
Giúp mình với ạ:
1) (0,4x-2) - (1,5x+1)- (-4x-0,8)=3,6
2) \(\left(\frac{3}{4}x+3\right)-\left(\frac{2}{3}x-4\right)-\left(\frac{1}{6}x+1\right)=\left(\frac{1}{3}x+4\right)-\left(\frac{1}{3}x-3\right)\)
3) x+2x+3x+4x+...+100x=-21
0,25x-0,4x=1
0,25x -0,4x = 1
x(0,25 - 0,4) = 1
-0,15x =1
x = 1 : (-0,15)
x = - 20/3
a) 1,2 – (x – 0,8) = –2(0,9 + x)
b) 3,6 – 0,5(2x + 1) = x – 0,25(2 – 4x)
c) 2,3x – 2(0,7 + 2x) = 3,6 – 1,7x
d) 0,1 – 2(0,5t – 0,1) = 2(t – 2,5) – 0,7
e) 3 + 2,25x +2,6 = 2x + 5 + 0,4x
f) 5x + 3,48 – 2,35x = 5,38 – 2,9x + 10,42
phụ tui với nhiều bài quá làm hong kịp