a, 3x+2 +3x = 90
3x . 32 + 3x = 90
3x. ( 32 + 1 ) = 90
3x . 10 =90
3x = 90 : 10
3x = 9
3x = 32
x = 2
1+2+3+......+x =210
(x+1) . x : 2= 210
(x+1) . x = 210 .2
(x+1) .x = 420
21 . 20 = 420
x = 20
tìm x biết x-1/3 + 3x-5/2 + 2x/9 + -5x+3/9 = 210/420
Tìm x , biết:
X - 1/3 +3x -5/2 + 2x/9 + -5x +3/9 = 210/420
giúp mình gấp với
a.)x+1/2=-3/4
b)-6/5=2/x
c)2-3x/8=2/2-3x
d) |4+3x| + 5=9
giúp mình gấp với
a.)x+1/2=-3/4
b)-6/5=2/x
c)2-3x/8=2/2-3x
d) |4+3x| + 5=9
1) 3 ( 3x + 2 ) + 2 ( 2x + 4 ) = 90
2) 5 ( x + 1 ) + 3 ( 2x + 1 ) = 65
3 ) 3 ( 4 + 3x ) + 5 ( 1 + 2x ) = 100
tìm x
x-2/3+3x-5/2+2x/9+-5x+3/9=210/420
f, (x2-2x+3) chia hết cho (x-1)
g, (3x - 1 ) chia hết cho (x-4)
h, (x2+3x+90) chia hết cho (x+3)
Tìm x :
(x+5)-(x-9)=x+2
\(\frac{x-1}{3}+\frac{3x-5}{2}+\frac{2x}{9}+\frac{-5x+3}{9}=\frac{210}{420}\)
b) 15-3(3x+18)=36
c) -12+(3-x)=25
d) 100 - 90.(x:2 -1)= -10
Tìm x biết: \(\frac{x-1}{3}+\frac{3x-5}{2}+\frac{2x}{9}+\frac{-5x+3}{9}=\frac{210}{420}\)