\(\dfrac{x-3}{x-5}=\dfrac{9}{25}\)
\(\Leftrightarrow25x-75=9x-45\)
\(\Leftrightarrow25x-9x=-45+75\)
\(\Leftrightarrow16x=30\)
\(\Leftrightarrow x=\dfrac{15}{8}\)
1. -2/9 x 15/17 + -2/9 x 2/17
2. -5/3 x 6/5 + -7/9 x 3/10
3. 15/20 x 7/5 + -9/7 x -6/4
4.-25/13 x 5/19 + -25/13 x 14/19
5 -7/13 x 13/5 + -9/7 x 5/3
9/25.x+3/5.(9/25+18)+9/25.x+18=x
Tìm x
1. -2/9 x 15/17 + -2/9 x 2/17
2. -5/3 x 6/5 + -7/9 x 3/10
3. 15/20 x 7/5 + -9/7 x -6/4
4.-25/13 x 5/19 + -25/13 x 14/19
5 -7/13 x 13/5 + -9/7 x 5/3
6. 27/35 x 5/9 - 2/7 x -7/5
7. 10/13 x 13/5 + {-9/5} x 10/3
8. 100/27 x 9/20 + 40% x 5/3
9. 1,5 x 5/12 + 1/4 x 3/4
10. 2 1/2 x 7/5 + {-9/10} x 2/3
11. X + 45% = 2 1/2 -5/3
12. 80% + X = -5/2 + 3/4
13. 4/25 - X =-5/2 + -3/10
\(\frac{9}{25}x+\frac{3}{5}\left(\frac{9}{25}x+18\right)+\frac{9}{25}x+18=x\)
11×(x-9)+22=99
4×(x-3)+1=49
25+3×(x-8)=106
9×(x-4)-25=20
5+20÷(x+3)=7
25-14÷(2×X-3)=23
5+4×(2×X-3)=25
40-21÷(2×X+3)=33
x/3=7/25+ -1/5
4/9 + x/5 =5/11
-5/9 + x/10=1/3
x/3=7/25+ -1/5
4/9 + x/5 =5/11
-5/9 + x/10=1/3
help
1/ (\(\left(-\dfrac{2}{3}\right)\)\(^2\) x \(\dfrac{-9}{8}\) - 25% x \(\dfrac{-16}{5}\)
2/ -1\(\dfrac{2}{5}\) x 75% + \(\dfrac{-7}{5}\) x 25%
3/ -2\(\dfrac{3}{7}\) x (-125%) + \(\dfrac{-17}{7}\) x 25%
4/ (-2)\(^3\) x (\(\dfrac{3}{4}\) x 0.25) : (2\(\dfrac{1}{4}\) - 1\(\dfrac{1}{6}\))
n) 3-|2x-1|=(-5)
o) 12+|3-x|=9
p) |x-9|=12+(-9)+2
q) |x+5|-5=4-(-3)
r)-|-5|-(-x)+4=3-(-25)
