3x-2+3x+2=2214
=>3x-2+3x-2+4=2214
=>3x-2+3x-2.34=2214
=>3x-2.1+3x-2.81=2214
=>3x-2.(1+81)=2214
=>3x-2.82=2214
=>3x-2=2214:82
=>3x-2=27=33
=>x-2=3
=>x=3+2
=>x=5
3^x+4 + 3^x = 2214
3x + 3x + 4=2214
a,1/3 .(x-2/5)=3/4 b, 7/3:(x-2/3)=4/5 c,1/3.(x-2/5)=4/5 d, 2/3.(x-1/2)-1/4.(x-2/5)=7/3 e,3/7 .(x-2/3)+1/2=5/4.(x-2) f,1/2.(x-3)+1/3.(x-4)+1/4.(x-5)=1/5 g,[2/3.(x-1/2)-4/5]:(x-1/3)=21/5 h, {x-[1/2.(x-3)+11/5]}:(x-1/2)=3/5 i,x.(x-2/5)-(x+2).x+11/4=4/3
bài 3:
a) x - 3/4 = 6 x 3/8 b) 7/8 : x = 3 - 1/2 c) x + 1/2 x 1/3 = 3/4
d) 3/2 x 4/5 - x = 2/3 e) X x 3 1/3 = 3 1/3 : 4 1/4 f) 5 2/3 : x = 3 2/3 - 2 1/2
4.Tìm x ,biết
a,2.(x-2)-3=x+2
b,3-2.(3-x)=3.(x-10)-17
c,2./x-2/-3=15
d,9x+3)^2=16
e,(5-x)^3=-27
g,x.(x-2)=(x-1).(x-2)
h,3./x-2/+2./x-2/=15
k,(x-2).(x-3)=(x-3).(x-4)
m,(x+1)^2=(x+2)^2
Bài 1: Tìm x
x-7/12.x=5/24-3/8.x
(x-1/2).(-3-x/2)=0
x-3/-2=-8/x-3
=) (x-3).(x-3)=(-2).(-8)
(x-3) mũ 2 =16
tìm x
(3^2-2)x(x-12+35=5^2+279:5
260 : (x-+4) = 5 ( 2^3 + 5)-3(3^2+2^2)
7^x-3 = 343
(x-3)^2017 = (x-3)^2016
(2^3 + 3)x (x-5) +14= 5^2+124:2^2
-2(x mũ 2 - 3x+2)+ 3(x mũ 2 - 4)
4(x-x mũ 2+2) + 3(x mũ 2 - 2x-4)
-5(x+2) - 3(x+1)
-2(x-3) - x(x-3)
-6(x+2)- (x+1)3
Tìm x:
a) 2 3/4 - x=3/4
b) x:5/6=-3/5
c)1 1/3 +2/3:x=1
d) x-1/9=8/3
e) 1/2 x + 650%x-x= -6
g) 2(x - 1/2) + 3(-1+x/3)=x(2/x - 1) (x khác 0)
h) x-2/20= -5/2-x
i) (x/2-1)3 + 2=-11/8
k) (x/3 +1/2) (75% - 1 1/2x)=0
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