\(\Rightarrow3^{x+1}+3^{x+2}=7.16-4=108\\ \Rightarrow3^{x+1}\left(1+3\right)=108\\ \Rightarrow3^{x+1}=27=3^3\\ \Rightarrow x+1=3\\ \Rightarrow x=2\)
Tìm x :
A) (3x - 1)(-2x + 5) = 0
B) \(\frac{1}{3}x\)- \(\frac{2}{5}\)( x - 1) = 0
C) 3( x - \(\frac{1}{2}\)) - 5( x +\(\frac{3}{5}\))=\(\frac{1}{5}\)
Rút gọn
\(\frac{7.25-49}{7.24+21}\)
Tính :
1) 4(3x+4)
2) 4/3(5/3x+6)
3)(4/3x+7).5+2
4)(3/7x-6).(-7)+3x
Tìm x
a) -3 1/2 : (4/5-1/2x) = 2^2
b) 2x + 3x = 5
c) -2/3x - 1/3x = -2
d) -2/3 (x+1) - 1/2 = -1/3
tìm x thuộc z
1)(-3x+2)-(5-3x)=-3
2) 3+x-(3x-1)=6-2x
3) (x-5).(3x+4)=0
4) 7x.(2x-1)=0
5) (3x-1).2x=0
giúp mik với mai mik đi học rùi :((
-3(2x-1)-5(3x+2)=14
-4(3x+5)+7(-2x-3)=-11
2(-3x+4)+3(x-5)=2(x+6)+1
-5(3x-1)-4(-2x+3)=0
-7(2x-1)+5(3x-4)=-3(x-5)
|x-3|=0
3|x+2|-5=16 cac ban lam nhanh nhe
a) 3x + 3x+1 + 3x+2 =117
b) 3 + 4 (x - 10) = 32 + 6
tìm x biết: 4+1/3x (1/6-1/2)<= x<= 2/3x (1/3-1/2-3/4)
1/Tìm x,biết:
a)x+(x+1)+(x+2)+(x+3)+...+(x+99)+(x+100)=5555
b)1+2+3+4+...+x=820
c)3(x+1)=9.27
d)x+2x+3x+...+99x+100x=15150
e)(x+1)+(x+2)+(x+3)+...+(x+100)=205550
f)3x+3x+1+3x+2=351
Bài 1 tìm x a, 1/2=x+1/3x b, -3/x+1=4/2-3x
