2 x 20 = 40
sum - means addition less - means subtraction twice - means multiply by 2
X = number. 4X + 9 = 2X - 15 ===========
2x - 4 = 6x -4 = 4x x = -1
Let the unknown number be x: x-4 = 2x -4 = 2x-x -4 = x So the number is -4
9+4x=2x-1 2x=-10 x=-5
twice a number can be 2x and six less than it is 2x-6.
20
There is no selected number so it would be a variable. The answer is 2n-9 (n is the number which you choose)
the quotient of twice a number and six is.... 2x/6 four less than three times the same number is .... 3x-4 So the equation would be 2x/6=3x-4
Let the number be x Twice a number means 2x 7 less than twice a number means 2x-7
sum - means addition less - means subtraction twice - means multiply by 2
If the number is n then twice the number is 2n and 7 less than twice the number is 2n - 7This could also be a boolean variable based on another variable. If the number is less than or equal to 3.5, the variable is false. Otherwise, it is true.
If the number is 'z', then five less than twice the number is ( 2z - 5 ).
One less than twice a number = (X times 2) minus 1, (where X = your number of choice).
X = number. 4X + 9 = 2X - 15 ===========
This forms an equation which solves nicely: 2x-7 = x-1 x-7 = -1 x = 6
2x - 4 = 6x -4 = 4x x = -1