Solve for X exactly,?
538168
Let 4^x = z.\nThen the given equation becomes z - 3/z = 8\nor z^2 - 3 = 8z [multiplying both sides by 'z']\nor z^2 - 8z - 3 = 0\n\nUsing Sridharacharya's formula for root of quadritic equation\nz = [-(-8) +/-sqrt{(-8)^2 - 4*1*(-3)}]/(2*1)\n= 8.358898943 or -0.358898943\n\nHence either 4^x = 8.358898943 or 4^x = -0.358898943\n\nIn the first case taking logarithm of both sides w.r.t. base 10\nlog(4^x) = log(8.358898943)\nor x*log(4) = log(8.358898943)\nor x = log(8.358898943)/log(4) = 1.53165646\n\nIn the second case we find that power of a positive number (4) is negative (-0.358898943) which is impossible.\n\nSo 4^x = = -0.358898943 is inadmissible.\n\nHence x = 1.53165646 is the only solution.
789893
x+4(2x+1)=3( x-2)+10x : x=2.5\n\nI like to work with x
1033116
A X = D\nX = A^(-1) D. (A inverse * D)\n Do it ur self.
599364
x^2 + x = x(x+1)\n\nIt can be simplified to x(x+1).
2302
(1) = x\n(2) = / \n(3) = x
859187
I'll do one for u.\nIn the first,\nMultiplying both sides by x*,we get\nx+3x+2x*=7x*\n4x+2x*=7x*\nMoving 4x and 2x* to the R.H.S.\n5x*-4x+0=0\nThus 5x*-4x=0\nAttempt the others in the same manner.
904672
let u = x^2 + 1, then you have du = 2xdx, => dx = 1/2x du,\n\nsubstitute back you are on the way  to solve it
1155111
xsquare=x+x+x...x terms\nby diff x\n2x=1+1+1...x terms\n2x=x\n2=1
356346
This is an equation for a straight line.  For any value of x, there is 1 value of y that solves the equation.
1076564
What do you want to solve for? x? y? or do you want an ordered pair (x,y) that works (integers maybe?)
618060
this would multiply out to be 4x^2-9\n\nif you let the expression be equal to 0, then x would be positive or negative 3/2 because either (2x+3) = 0 or (2x-3) = 0, and just solve for x
758848
let y = x^x\nw = ln y = xlnx\nthen y = e^w\ndy/dx = e^w * dw/dx\ndw/dx = x(1/x) + lnx = 1+lnx\ndy/dx = (1+lnx)*x^x
809248
Just break it into parts. X=1x. X can be any other variable but the thing that matters is that all the variables are the same. 1x-.8x=.2x. Then .2x-2.9x= -2.7x. It simplifies down to -2.7x but there is know way to figure out what the value of X is. If the equation was x-.8x-2.9x=any thing a value for x would be possible to find but there is known and so there is no way to find the value of x on it's own.
790936
x≠０\ncuz if x=0, (x-7)/x^3 is meaningless
610726
there is a solution, all x,y that satisfy this equation:\ny = 4 - 2x\n\nwhich is a straight line with intercepts (0,4) & (2,0)\n\nIt has an infinite amount of solutions. To be able to solve for actual numbers, you need as many equations as you have variables.
745882
C is correct but not complete... only the 3 is factored out... the real answer would be:\n\n3(x-1)(x+4)
990847
isolate the variable\n\n-7x+1+8x=x+1\n-7x+8x=x\nx=x\nx=1\n\nthe answer is c) 1\nnow give me 10 points please!!!