\(\Leftrightarrow3^x=27\)
hay x=3
\(3^x+15=42\)
\(3^x=42-15\)
\(3^x=27\)
=> x=3
\(\Leftrightarrow3^x=27\)
hay x=3
\(3^x+15=42\)
\(3^x=42-15\)
\(3^x=27\)
=> x=3
tìm số nguyên x biết:
a)x/-3=-15/-5
b)x/9=-7/63
c)x+3/15=-1/3
d)42/-54=-7/x
(3.x-15).17=42
a) 42-x=5
b) 15.(x+4)=75
c) 27+3x=9^8.9^7
d) x+18=12
e) 2x-15=-19
f) 36 :(x^3-12)=-3
g)x+15=35
h) 2x-13=3^2
Tìm stn x biết
[3 (42-x )+15]÷5=2^3×3
Tìm x, biết:
a) x + 99:3 = 55
b) (x - 25): 15=20
c) (3.x - 15).7 = 42
d) (8x - 16)(x-5)=0
e) x.(x+1)=2+4+6+8+10+...+2500
a) 15 : (x + 2) = 3 b) 20 : (1 + x) = 2
c) 240 : (x – 5) = 22.52 – 20 d) 96 - 3(x + 1) = 42
96-3(x+8)=42
15.5.(x-25)-225=0
250:x+15=25
36:(x-5)=2^2
[3.(70-x)+5]:2=46
Tìm x biết
A, 3^x.3=243
B, 2^x-15=17
C, (x-1)^2-7=42
Tìm x, biết:
a) ( 35 - x ) - 25 = 40 - ( 15 - 18 )
b) x + 42 = -15 + 27 : 3 ^ 2
c) 27 - ( 5 - | x | ) = 31
Tìm x \(\in\)N :
15 . ( 3 + 42 : x ) = 135