what is 0.3x-15=0.2x-5?
538339
0.3x-15=0.2x-5\nIt's an equality.  As long as you do the same thing to each side, it will remain true, and have the same value for x.\nAdd 15 to both sides, and so simplify the expression:\n0.3x-15+15=0.2x-5+15\n0.3x = 0.2x+10\nNow take 0.2x away from both sides, so that all the terms involving x are one one side only:\n0.3x-0.2x = 0.2x+10-0.2x\nand simplify:\n0.1x = 10\nNow multiply both sides by 10, to give an expression for x:\n0.1x * 10 = 10 * 10\nx = 100\n\nFinally always check by putting the result back into the original equation:\n0.3*100-15=0.2*100-5\n30-15=20-5\n15=15\n☺\nx=100
455184
Is it an equation? then it goes like:\n3/(x-5)=2/(5-x)\n3*(5-x)=2*(x-5)\n15-5x=2x-10\n15+10= 2x+5x\n7x=25\nx=25/7=3 4/7 \n\nOt it's an expression to simplify?\n3/(x-5)+2/(5-x) = 3/(x-5) - 2/(x-5)\n = 1/(x-5)
776052
3*5b= 15b      \n3*-7= -21\n 15b-21=-7+b\n15b-b-21=-7\n15-b=-7+21\n14b=14\nb=14/14\nb=1
922439
x = 15\n\n10 - 15 = -5
823703
-30x^3y^5=2xy(-15x^2y^4)\n16x^3y=2xy(8x^2)\n-10xy^3=2(-5xy^2)\nso the expression\n2xy(-15x^2y^4+8x^2-5xy^2)/-4xy^3\n=-(1/2y^2)[-15x^2y^4+8x^2-5xy^2]
914486
just plug -1.5 in for x and see if it equals 1.5.       \n2 X -1.5 = -3                  -3 does not equal 1.5\nso the answer is false
1118181
-1.87\n\n-.65 +1.28 - 2.5 = -1.87
785818
15b = 55\nDivide both sides by 5\n15b/5 = 55/5\n3b = 11\nAnswer: 11
910478
(4/5+2/3)/(3/4)\n(12/15+10/15)/(3/4)\n(22/15)/(3/4)=(22/15)(4/3)=88/45=1 43/45=1.9555556
1175318
55 = 2*sqrt(5D)\n3025 = 4*5D\n3025 = 20D\n151.25 = D
172253
6x= -15-3\n6x= -18\nx= -18/6\nx= -3
888017
Put all the x's on one side of the equation and all the numbers on the other:\n\n5/2 x - 1/2 x = 15 - 3\n\nSum each side\n\n4/2 x = 12\n\nReduce\n\n2x = 12\n\nDivide both sides by 2\n\nx = 6
23893
There IS a solution:\n\n1x - .15x = 680\n\n.85x = 680\n\n.85x/.85 = 680/.85\n\nx = 800\n\nThere you go!!!
147408
(15-5) divided [ (12 divided by 2 *2) -2]\n\n= (15-5)/[12/(2*2) - 2]\n= 10/[12/(2*2) - 2]\n= 10/[12/4 - 2]\n= 10/[3 - 2]\n= 10/1\n= 10
911395
The easy way is to reverse the divisor. \nie 2/3 divided by 5/9 is the same as 2/3 times 9/5 which is \n(2 x 9)/(3 x 5) = 18/15 = 1 & 1/5
1133339
1cm/15m=Xcm/40m\n\nX=40/15=8/3cm\n\nI hope that does the trick
38332
(x-2)/(x^2-2x-15)+(x+2)/(5-x)\n(x-2)/((x+3)(x-5))+(x+2)/(5-x)\n(x-2)/((x+3)(x-5))+(-2-x)(x+3)/(x-5)(x+3)\n\n[(x-2) + (x+3)(-2-x)] / [(x+3)(x-5)]\n\nANSWER :\n(x^2+4x+8)/((x+3)(5-x))