how do you rewrite 5x-2y=4 in function form?
916581
To write any equation in "function form", just solve for y (get y by itself on one side of the =), and replace y with f(x).\n\nI'll let you do that.  :)
860625
(10x+8) - (5x+4)\n= 10x - 5x +8 -4\n= 5x + 4
232592
2x = 3y - 4y + 5 - 2\n2x = -y + 3\n2x + y = 3
597439
=[(4+3x)/x] + (2/3)[(5+3x)/x]\n=[(4+3x)/x] + [(10+6x)/3x]\n=[(12+9x+10x+6x)/3x]\n=[(15x+22)/3x]
479219
2x + 5y = 8\n5x - 2y = 20\n\nSince none of the coefficients are multiples of one another, you must choose either and find a common factor.  One easy way to do it is to multiply the top equation by 5 and the bottom by -2\n\nThen they become\n\n10x + 25y = 40\n-10x + 4y = -40\n\nAdd the two equations and you get\n29y = 0 this gives y = 0 as one solution\n\nIf y = 0 then substitute the value into either equation:\n\nFor example, 2x + 5(0) = 8\n\nThen x = 4\n\nThe final solution is (4, 0) You can check the answer by substituting the answer into both equations to see if it makes them both true.
720107
4x -12y =5...........(1)\n-x +3y = -1..........(2)\n\nMultiplying eq.(2) by 4 and add with eq.(1)\n(4x -12y =5) + (-4x +12y = -4)=\n0 = 1\nwhich is invalid.
598932
Replace y in the first expression by the value from the second.  You get:\n8x - 4(2x - 4) = 16\n\nNow simplify:\n8x - 4*2x - 4*-4 = 16\nthat's four times minus four...\n8x - 8x - -16 =16\n16 = 16\nThis holds for any value of x.\nThis has occurred because the two expressions are the same!\nIf you divide the first expression by 4, you get:\n2x - y = 4\nnow make y the subject (add y to both sides, then take 4..)\n2x - 4 = y\n\nIf you were to substitute your solution into the second expression, you would have:\n-1 = 2*3 - 4   clearly this is not a solution...\n\nIf x were 3 then y would be 2*3-4 = 2\n\nI hope the explanation above is of some use!
321475
*(2x/(x^2-4)) + (5/2-x) - (1/2+x)\n*(2x/(x^2-4)) + (5/2-x)((2+x)/(2+x)) - (1/2+x)((2-x)/(2-x))\n*(2x/(x^2-4)) + (10+5x)/(4-x^2) - (2-x)/(4-x^2)\n*(2x/(x^2-4)) + (8+6x)/(4-x^2)\n\nyou should be able to get it from there
895848
The opposite\n\ne.g. \nto cancel 5, add -5 to both sides\nto cancel x², add -x² to both sides\nto cancel -12x, add 12x to both sides\netc.
86920
5x - 13 =3y , 4x - 11 = 3y\nSubstitue\n5x - 13 = 4x -11\nsubtact 4x\nx - 13 = -11\nadd 13\nx = 2\n\nplug 2 in\n5 * 2 -3y = 13\n10 - 3y = 13\n-3y = 3\ny = -1
930601
put -2y=5-3x call it equation {1}\ncall 4x-5y=86 {2}\n\nmultiply all of the terms i {1} by 5\nmultiply all ot the terms in {2) by 2\nthis gives -10y=25-15x {3} &  8x-10y=172 {4}\nyou've got -10y in terms of x in {3}, so just put that into {4}  8x+25-15x=172, -7x=157, \nx = -172/7 sub in to {1} to get y \nman that was ablast from the past, haven't done that for years.
728357
3x^2y^2(2y+3y)/3x^2y^2\n=5y
789893
x+4(2x+1)=3( x-2)+10x : x=2.5\n\nI like to work with x
168190
If you were to have the equations just as they are then 5x-3y would equal 7 not 13.  And 4x-3y would equal 5 not 11.  So try putting in -1 as y, then it will work out as you have it originally written.
222015
5x - 2y = 4  (1)\n2x + 3y = 13 (2)\nmul. eq.(1) by 2: 2 (5x - 2y = 4)\n                    10x - 4y = 8\n\nmul. eq.(2) by 5: 5 (2x +  3y = 13)\n                    10x + 15y = 65\n\nsubtract: 10x -  4y =  8\n      (-) 10x + 15y =  65\n          ________________\n               -19y =  -57 \n                  y =  -57/-19\n                  y =  3\n\nsubstitute value of y to any of the eqs.\n\nSubstituting to eq. (1):\n\n    5x - 2y   = 4   \n    5x - 2(3) = 4\n    5x - 6    = 4\n    5x              = 4 + 6\n    5x              = 10\n     x              = 10/5\n     x              = 2\n\nso, x = 2\n    y = 3\n\nto check, substitute values of x and y to any of the two equations:\n    for eq. (1),\n\n    5x   - 2y   = 4   \n    5(2) - 2(3) = 4\n      10 - 6    = 4\n\n    for eq. (2),\n\n    2x   + 3y   = 13\n    2(2) + 3(3) = 13\n      4  + 9    = 13
1062229
Technically there are only 4 answers that will work, and they all rely on parentheses to modify the natural precedence rules:\n\n(5+5/5)*5\n(5/5+5)*5\n5*(5+5/5)\n5*(5/5+5)\n\nAs you can see they are all variations on (5 + 1) * 5, where you use 5/5 = 1.  So there is really just one answer.\n\nYou can easily solve problems like this yourself using the link below...\n\nFor example, can you make 24 using 3, 3, 8, 8?  Try it before you cheat... also, note that the solver allows % (mod) as an operator, so you may have to filter out those results.
712395
9x+5/(x-4)+(-7x)/(x-4)\n=9x+5-7x/(x-4)\n=(2x+5)/(x-4)