a) 2.3x=162
=> 3x=162:2
=> 3x=81
=> 3x=34
=> x=4
b) 3x+3x+2=810
=> 3x+3x.32=810
=> 3x.(32+1)=810
=> 3x=810:10
=> 3x=81
=> 3x=34
=> x=4
2.3^x=162
3^x= 162:2
3^x= 81
3^x= 3^4
=> x=4
Tìm x
(3x - 1)mũ 6 +746 =810
Ai đúng mình tick
Tìm X
a, (2x-10)37=0
b, 135(34-x)=810
c, x+2x+3x+.....+100x=40400
d, 3(x+2)=5(x-3)-x
e, 275-(x+5):3=124
f, 142-2(x+279:9)=24
1) tìm x: 52x-3 – 2.58 = 3.58
2) tìm x: (3x - 2) - (2x + 5) = -7
3) tìm x: 5x - 13 = - 49 - 4x.
4)tìm x: x + ( x +1) + ( x + 2) + …+ ( x + 30) = 496
5) tìm x: 3x + 3x+2 = 810
6) Tìm các số nguyên x, y thỏa mãn: 3xy + x + 3y = 4
Tìm x biết :
a) 3x + 3 - ( x + 4 ) = 7 + ( 4x - 1 )
b) 3x+1 + 3x+3 = 810
c) \(1\frac{1}{2}:\left(\frac{1}{2}-\frac{1}{3}\right)-x=5\)
d) \(2,4:\left(25\%+\frac{x}{40}\right)-\frac{12}{15}=3\frac{1}{5}\)
3x+3x+2+3x+2=1080-3x+3
CMR (x^2+3x)^2+2(x^2×3x) =(x^2+3x+1)^2
Tìm x; biết: 3x + 3x+1 + 3x+2 + 3x+3 = 1080
a)2x+2x+1+2x+2=56
b)3x+3x+2+3x+3=111
3x + 3x+1 + 3x+2 = 117
2/3X - 2 2/3X = 1: 0,5