Ta có: 23x + 2 = 4x + 5
<=> 23x + 2 = (22)x + 5
=> 23x + 2 = 22x + 10
=> 3x + 2 = 2x + 10
=> 3x - 2x = 10 - 2
=> x = 8
Ta có: 23x + 2 = 4x + 5
<=> 23x + 2 = (22)x + 5
=> 23x + 2 = 22x + 10
=> 3x + 2 = 2x + 10
=> 3x - 2x = 10 - 2
=> x = 8
Tim x biet
A, 2x +23x = 625
B, (2^2+4^2) x + 2^4 ×5 ×x =100
C, (3x + 1)^2 = 6^2 + 8^2
D, (7x -11)^3 = 7^2 × 5^2 - 15^2
E, (2x- 1)^4 = 3× (3^2+4^3+2)
tim x,y biet
1/5x-y=13
2/23x+53y=109
3/12x-5y=21
4/12x+17y=41
ai biet giup minh voi
| - 18 | + ( - 12) va 2^3 .2^2+ 5^7 : 5^5 - 3^2 .6
va tim x biet
3^10 : ( 43- 4x ) = 3^7
tim x biet : 34x-2-50=29/26
tim x biet
3*|x-4|+4x=5
giup minh voi
tim so nguyen x biet : 4x-5 chia het cho x
Nhanh nha !!!
Tim x biet
|x+1|+|x+2|+|x+3|=4x
tim x biet : (2x-1)+(4x-1)+...+(400x-200)=5+10+...+100
tim x;biet
a;x-14=3.x+18
b;|x+3|+|x+9|+|x+5|=4x
tim cac so nguyen duong x;a;b biet 4x+9=3^a;2x+5=3^b