=> (2+2x)[(2x-2)/2+1]/2=156
=>2(x+1)x/2=156
=>x(x+1)=156
=>x(x+1)=12.13
=>x=12
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=> (2+2x)[(2x-2)/2+1]/2=156
=>2(x+1)x/2=156
=>x(x+1)=156
=>x(x+1)=12.13
=>x=12
Tim so nguyen x biet : -x/2+2x/3+x+1/4+2x+1/6=3/8
Tim x biet :2x . (-2)2x . 8x = 46
Tim x biet x^2+2x+6 chia hết cho x+4
Tim x biet x^2+2x+6 chia hết cho x+4
tim x biet (x+1) + (x+4)+(x+7)+...+(x+28) = 156
Tim x biet
2x + 3 =7
x^2 +4 =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)
Tìm x
2+4+6+8+...+2x= 156
Tim so nguyen x biet
(19x + 2.52) : 14 = (13 - 8)2 - 42
-2x3 - 6 = 42 . 3