2n - 2
It's seven
2x = 3x - 22x - 3x = -2-x = -2x = 2Therefore, the number is 2.
sum - means addition less - means subtraction twice - means multiply by 2
2x-3=x+2 answer x=5
2n - 2
It's seven
Elemental hydrogen and helium have atomic masses less than twice their atomic numbers.
2x = 3x - 22x - 3x = -2-x = -2x = 2Therefore, the number is 2.
42,89
sum - means addition less - means subtraction twice - means multiply by 2
32 - 2x < 18
2x-3=x+2 answer x=5
13 and 26
32-2x < 18
twice a number can be 2x and six less than it is 2x-6.
The two numbers are 10 and 14.