x+2x=303x=30
x=10
10
It is: 15+15 = 30
To write twice the sum of a number and 600, you first express the number as a variable, such as ( x ). The sum of the number and 600 can be written as ( x + 600 ). Therefore, twice this sum is represented as ( 2(x + 600) ).
"the sum of 2" and "twice" "a number" "is" "36"2+2x=36 â–
?=2n+7
10
20
It is: 15+15 = 30
If the number is n, then twice the number is 2n and the sum of the two is n + 2n = 3n.
"the sum of 2" and "twice" "a number" "is" "36"2+2x=36 â–
There aren't any numbers like that. You might be thinking of 28, which has a sum of all its factors equal to twice itself, making it a perfect number. Proper factors are a different set.
Correction: Here is the equation you will need to solve: 7N - 30 = 2N + 5 --> 5N = 35 --> N = 7
the unknown number is 30 as 50 = x +2(10) so 50 = x+20 so 30 = x
If the sum of a number and 4 is (X + 4) then twice that is 2(X + 4) which is 2X + 8
2x + 7
?=2n+7
2n + 33