Let X = the number
X + 2 = 3X+6
subtract x from both sides
2 = 2X +6
2X + 6 = 2
subtract 6 from both sides
2X = -4
divide by 2
X = -2 = the number
There is no such number.
-9.
-64
If they are two different unknowns then it is: 4x+8y = 36 If they are the same unknowns then it is: 4x+8x = 36 in which x works out as 3
987 - 345 = 642
50
There is no such number.
It is called a sum or an equation
To balance a equation, the whole number added or used in front of a compound is known as Coefficient.
14
9 x represents a number so in this equation it basically means what number is added to 9 to make 18 to work it out you do 18-9=9
Any number added to its negative equals zero.
-9.
357
A linear relationship. Added: And a function.
No. There are 2 Na atoms being added to 1 Cl atom.
N represents the number of neutrons in an atom, A represents the atom's mass number and Z is the atoms proton number. This makes sense because it shows that the mass number of an atom is the number of protons added to the number of neutrons in the nucleus.