Solve 6/(x-3) + x/(x+4) = 1
(6(x+4) + x(x-3) )/ ((x-3)(x+4)) = 1 obtain a common denominator and write as one fraction. (6x+24+x2-3x ) /( x2-3x+4x-12) = 1 multiply out the brackets. (x2+3x+24)/ (x2+x -12)= 1 Simplify the top and bottom. x2 +3x+24 = x2+x-12 Multiply both sides by the denominator. 3x+24 = x-12 Subtract x2 from both sides. 2x+24 = -12 Subtract x from both sides. 2x = -36 Subtract 24 from both sides. x = -18 Divide both sides by 2
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All answers ▸Two shops have deals for purchasing pens: "3 for £2" and "5 for £3" . Mr. Papadopoulos wants to buy 30 pens for his class in school, which deal should he use if he wants to spend the least amount of money possible, and how much will he spend?
Solve for x, 4x+3.5 = 1
expand and simplify (x+4)(x-2)^2
Expand and simplify: (10-x)/2 = 2x - 6