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You can multiply both sides of a by the same number without changing the value of the?
An 'equation' is a statement that you're given, and you're told that it's true. You can add or subtract the same number to each side of the equation, and you can multiply or divide each side of the equation by the same number, without changing the truth of the statement. These handy operations are the methods you use to tease out the value that the equation's variable must have in order for the statement to be true. (There's no such thing as the 'value' of an equation, only the truth of the equation, and the value of its left side, its right side, and its variable.)
What is the value of n in the equation n-513?
Without an equality sign the given expression is not an equation.
What is the value of n in this equation 6n216?
Without an equality sign it is not an equation. But if: 6n = 216 Then: n = 36
What is the value of x in the equation 25x-218?
Without an equality sign the given terms can't be considered to be an equation.
What is the value of x given the equation 3x plus 4 plus 5x-6?
Oops! That's not an equation. It has no 'equals' sign ( ' = ' ) in it, so it's just an 'expression' that stands for a number. The number that it stands for depends on the value of 'x', and any time 'x' changes, the value of the expression changes.
