\(91-5\left(5+x\right)=61\)
\(\Rightarrow5\left(5+x\right)=91-61\)
\(\Rightarrow5\left(5+x\right)=30\)
\(\Rightarrow5+x=\dfrac{30}{5}\)
\(\Rightarrow5+x=6\)
\(\Rightarrow x=6-5\)
\(\Rightarrow x=1\)
Tìm x bt
A:|x+75%|= 2/1/5
B: (x+1/2). (2/3-2x)= 0
C: | 2x -1/3|+ 5/6= 1
D: x+2/5= 7/12-1/1/4
E: (x+ 2/3). (-3/5 -2x)= 0
F: (2/4/5 x- 50): 2/3=51
G: 2/5+ 3/5. (3x- 3,7)= -53/10
H: 7/9:( 2+3/4x)+ 5/9= 23/27
\(3\left(x-\dfrac{1}{2}\right)-5\left(2+\dfrac{3}{5}\right)=-1\dfrac{1}{5}\)
(x-5)(x-7)=0
Bài 2 Tìm x biết :
a) x + 23 = 52
b) 2 x + 3 = 72
c) 2 x -1= 598 : 596
d) 7 x + 3 = 35 . 23 . 9
e) 2 2x+6 =1
j ) 2x = 8
g) 2x : 23 = 16
h) 2x + 2x+1 + 2x+2 = 56
5 x 8-(9+x)=20
x=
Tìm số tự nhiên x biết
5 * 2mũ2 + (x + 3 ) = 5mũ2
(2x+29):(x+5)
24+3 (5 -x) = 27
5.(x-9)=350
