math question : 1/A + 1/B +1/C = 3/7?
954059
there is a logical way to indicate solutions\n\nfind smallest A such that 1/ A < 3/7\nA= 4\nNow if A = 4\n1/B+1/C = 3/7 -1/4 = 5/28\n\n5/28 = (1+4)/28 = 1/28+1/7 \n            (2+3)/28 no\nif we take A = 5 we may get more solutions\n\n1/B+1/C= 3/7-1/5= 8/35\n= (1+7)/35 = 1/35+1/5 allow if duplicates permitted else no\nno other\n\ntake A =6 and we get\n\n1/B+1/C = 3/7-1/6 = 11/42\nno other solution as 11/42 is not sum of reciprocal
857250
Find the common denominator.\n\n7/3 = 112/48\n7/8 = 42/48\n7/16=21/48\n\nadd up the numerators   = 175\n\n175/48 and reduce
916838
(1/2)(1/2)=1/4\n\nB. 1/4
922233
You start with [3-(a/b)] / (a/b)\n\nTo get a/b out of the denomenator, multiply the top and bottom of the fraction by b/a:\n\n[3-(a/b)] * (b/a) = (3b/a) - (ab/ba) = (3b/a) - 1\n\nNow find common denomenators:\n\n(3b/a) - (a/a) = (3b - a) / a\n\nand there's your answer:\n\n(3b - a) / a
308039
[3x/(5x+15)][(7x+21)/3]\n= [3x/(5(x+3))][7(x+3)/3]\nCancel the 3's and the (x+3)'s\n= [x/5][7/1]\n= 7x/5
272590
1/a + 1/b = c  multiply both sides by ab\n\nb + a = abc  get the terms with b on one side\n\na = abc - b factor out a b\n\nb(ac - 1) = a  divide by ac - 1\n\nb = a/(ac - 1)
168359
1/3 + 1/2 = 2/6 + 3/6 = 5/6
757427
1/3 times 3/7 equals 3/21 equals 1/7.\n\nthe threes also cancel out.\n\n\ntry writing it out where the fraction bars are horizontal and maybe you can see how the numbers cancel out better. if you're multiplying and have the same number on the top of one fraction and the bottom of the other, the two numbers cancel.
390719
so you have (1/2)a+a-(6/3)=4+(1/3)a\n\nadding like terms: (3/2)a-2=4+(1/3)a\n\nsubtract (1/3)a from (3/2)a and add two to both sides:\n(3/2-1/3)a=4+2\n(9/6-2/6)a=6\n(7/6)a=6\n\nnow solve and what do you get? :)
879152
Multiply (2x+1)/(3x-4) by 7/7 to give 7(2x+1)/7(3x-4)\nMultiply 5/7 by (3x-4)/(3x-4) to give 5(3x-4)/7(3x-4)\n\nNow they have a common denominator you can just add the fractions\n\n(7(2x+1) + 5(3x-4))/7(3x-4)\n\n(14x + 7 + 15x -20)/7(3x-4)\n\n(29x - 13)/7(3x-4)
19948
a/bX + c = d\n\nfirst add -c to both sides\n=> a/bX + c-c = d-c\n=> a/bX = d-c\n\nNext time multiply b on both sides\n=> b * a/bX = (d-c) * b\n=> aX = b(d-c)\n\nAnd last divide both sides by a\n=> X = b(d-c)/a\n\nin this case:\n\nX = -4
762985
(b-4)/(b-4)(b+4) simplifies to 1/(b+4)\nrestrict denominator...bcannot equal 4 or -4
793566
10 - 7 = 3\n\ntherefore 3 x 4 (for the 1/4) = 12\n the number is 12
949276
hi dear xmixxdiam \n\n(7/20 + 3/5) - (3/8 x 4/9)\n● Part 1\n7/20 + 3/5\n- first take a common denominator and its ' 20 ' \n( 7 + 12 ) / 20 = 19 / 20 \n\n● Part 2\n3/8 * 4/9 = (3  / ( 4 * 2) ) * ( 4 / (3 * 3))\n- Now cancel " 3 " & " 4 " \n1/ 2 * 1/3 = 1/6\n\n● Part 3\n19 / 20 - 1 / 6 = ( 57 - 10 ) / 60 = 47 / 60 = 0.783 { bar over 3 } \n\nGood Luck Darling ♣
909284
((1/x) + (1/y)) / ((1/x) - (1/y))\n\n((y + x)/xy) / ((y - x)/xy)\n\n((y + x)/xy) * ((xy)/(y - x))\n\n(xy(y + x))/(xy(y - x))\n\n(y + x)/(y - x) = (x + y)/(-x + y) = (x + y)/(-(x - y)) = -(x + y)/(x - y)
1038896
= 9/4 * 7/3\n= 63/12\n= 21/4\nor 5 1/4
801424
If m equals to 7\n3 (m-5)+1 = 2(m+1)-9\n3m-15+1 = 2m+2-9\n3m-14 = 2m-7 (add 7 to both side)\n3m-7 = 2m (subract 3m from both side)\n-7 = -1m\n-7 = m