\(2x+11=3\left(x-9\right)\)
\(\Leftrightarrow2x+11=3x-27\)
\(\Leftrightarrow x=11+27=38\)
Ta có: 2x+11=3(x-9)
\(\Leftrightarrow3x-27=2x+11\)
\(\Leftrightarrow3x-2x=11+27\)
hay x=38
Vậy: x=38
tìm x biết a,-1+3-5+7-9+11-...+x=100
b,x mũ 2 -2x+3 chia hết cho x-1
Tìm x biết:
a,x-5/7=1/9
b,2x/5=6/2x+1
c,11/8+13/6=85/x
d,2x-2/11=1.1/5
e,x/15=3/5+-2/3
f,x/182=-6/14.35/91
Tìm các cặp số nguyên (x,y) nguyên biết
(x-13).y-(11+x).7=9(x+11).y-(11+x).7=5(2x-1).y+(1-2x).3=17(x+23).y-x=4(x+5).x.y-x-5=31
Câu 1:Tìm x biết x thuộc Z:
a,(3/4)^2x = (12.5^9.(-7)+3.7^9.(-5).11) / (35^9.2^4)
b,1/3+1/6+1/10+...+2/x.(x+1)=449/1000
tìm x :
a) (x+3)+(x+5)+.......+(x+53)=754
b)9+11+13+...+(2x+1)=1280
f)(3x-9).(x-7)=0
TÌM SỐ TỰ NHIÊN X :
1/3 + 1/6 + 1/10 + ... 1/ x × ( x + 1 ) : 2 = 2001/ 2003
TÌM X :
a) ( x + 1 ) \(^{ }^2\)= 4/3 × 75/9
b ) ( 4,5x - 2x ) × ( -11/ 7 ) = 11/14
|-2x + 1|=3
(x+9-17)-24=11-(x+17)
-3.(2x+1)-11=-8-2.(x+3)
|x+4|+x=12-x
Tìm x
a,-5×(-x+7)-3×(-x-5)=-4×(12-x)+48
b,-2×(15-3x)-4×(-7x+8)=,-5-9×(-2x+1)
c,7×(-x-7)-5×(-x-3)=12×(3-x)
d,5×(-3x-7)-4×(-2x-11)=7×(4x+10)+9
tìm x
2x + 11 = 3( x - 9)
