As usual when solving equations, you need to "isolate" the variable, in this case, the variable "x". 4x means 4 times x; if you divide both sides of the equation (the left side and the right side) by 4, you will have achieved this.
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by 4. You do this because you want to find out what x equals. If you divide by 16, you find out what 1/4X equals, and that isn't much good to you. x=4 is the answer.
The equation is -2y + 16 = 10
To solve for X in the equation "X over 9 equals 1 over 16," we can cross multiply. This gives us 16X = 9. Dividing both sides by 16 gives us X = 9/16.
16 = 16 is an identity, not an equation. An identity does not have solutions.
The possibility of your next question being noob is approximately 29 over 16.