6x-8=457-435=22
6x=22+8=30
x=30:6
x=5
6x-8=457-435=22
6x=22+8=30
x=30:6
x=5
a, 2x.(22)2=(23)2
b, (x-6)3=(x-6)3
(x-6)(7-x)=0
x+(x. 1)=2+4+6+8+10+..........+2500
X=?
\(\dfrac{-5}{6}\) + \(\dfrac{8}{3}\) + \(\dfrac{-29}{6}\) ≤ x ≤ \(\dfrac{-1}{2}\) + 2 + \(\dfrac{5}{2}\)
tìm x: \(\dfrac{3}{x+5}\)= 15%
Bài 6:
a) x+5 chia hết cho x+3
b) 2x-1 chia hết cho x+2