Ta có : 810x = 327x-5
=> 23.10x = 25(7x-5)
=> 3.10x = 5(7x-5)
=> 30x = 35x-25
=>30x-35x= -25
=>-5x = -25
=> x=5
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Ta có : 810x = 327x-5
=> 23.10x = 25(7x-5)
=> 3.10x = 5(7x-5)
=> 30x = 35x-25
=>30x-35x= -25
=>-5x = -25
=> x=5
tim x biet [x-5][x+5]-x[x-10]=5
tim x biet: 5*x-3*(4*x-2*(4*x-3*(5*x-2)))=182
Tim x, biet :
(x+2)(x^2-2x+4)+x(5-x)(x+5)=0
(tim x biet (x+1)(2-x)-(3x+5)(x+2)=-4x^2+1
tim x biet :
2 (x +5 ) - x^2 - 5x =0
tim x biet: x. (5x-4) - 5(x2+8) + 10x = 12
tim x biet 1/x+1/x+2 + 1/x+5 +1/x+7= 1/x+1 +1/x+3 +1/x+4 +1/x+6
tim x biet 1/x+1/x+2 + 1/x+5 +1/x+7= 1/x+1 +1/x+3 +1/x+4 +1/x+6
tim x biet:
(2x-3)2 - (x+5)2=0