\(4^{x+2}-4^x=60\)
\(4^x.4^2-4^x=60\)
\(4^x.\left(4^2-1\right)=60\)
\(4^x.15=60\)
\(4^x=60:15\)
\(4^x=4\)
\(4^x=4^1\)
\(x=1\)
Đúng 1
Bình luận (0)
Các câu hỏi tương tự
5x (4x - 60 ) - ( 4x - 60 ) . 50 = 0
14+(273-7x).2=518
(358-x):5=2.52
60:5x=12
5x+3.54x-52x.53x+2=100
(4x+2)2-1=35
14+(273-7x).2=518
(358-x):5=2.52
60:5x=12
5x+3.54x-52x.53x+2=100
(4x+2)2-1=35
60 - 3 ( x - 2 ) = 51
4x - 20 = 25 : 22
B=1300+[7(4x+60)+11]
Tìm x, biết:a,
70
-
5
(
x
-
3
)
45
b,
10
+
2
x
4
5
:
4
3...
Đọc tiếp
Tìm x, biết:
a, 70 - 5 ( x - 3 ) = 45
b, 10 + 2 x = 4 5 : 4 3
c, 60 - 3 x - 2 = 51
d, 4 x - 20 = 2 5 : 2 3
A.(15/10x+25):2/3=60
B.5/2-x=1
C.x-0.3x=1.3
D.3/4x-2/3x=-5/12
Tìm x:
a) 2^x+70=74
b)120-4x:2=80
c)(3x+5)^2=400
d)5(x+7)^3=135
e)600-{100-[60+(x^3+10)]}=518
g){[(16x-30).8]+80}:5=224
Tìm x, biết:
a) 5x+15=60
b) 4x-12=12
(4x^2)^8÷(4x^2)^4÷(4x^2)^2