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The sum of what two consecutive whole numbers equals 15?
7 and 8. You know that the sum of any two consecutive whole numbers, x and x +1, is 2x +1 2x + 1 = 15 2x = 14 x = 7
The smallest you five consecutive even positive integers that have a sum of 260?
(2x) + (2x+2) + (2x+4) + (2x+6) + (2x+8) = 26010x + 20 = 26010x = 240x = 24The integers are 48, 50, 52, 54, and 56
How do you write twice the sum of a number and 8 equals 7?
If: 2x+8 = 7 then x = -1/2
What does x equals if the sum is 8x plus 8 equals 2x plus 38?
Set up the equation and solve: 8x + 8 = 2x +38 (subtract 2x and 8 from both sides of the equation) 6x = 30 (divide both sides of the equation by 6) x = 5
How do you factor x2 2x -8?
You find 2 numbers with a difference or sum of 2 which multiply to give -8. One possibility is that the numbers are -4 and 2, but the sign of the 2x term is needed. If the full equation is x2 - 2x - 8 then the factors are (x - 4)(x + 2) On the other hand if the 2x term is positive the factors are (x + 4)(x - 2)
