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Q: Is 3a-14 equals 4 is a equation or expression?

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An equation.

in maths, an expression is an equation with no equals sign. equation.............2+2=4 expression..........2+2

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2x + 4 is an expression, not an equation. There can be no solution set for an expression.

say X equals the age, the equation would be:x - 4 = ?

2 to the power of 4 is an expression, it is not an equation.

6 + (4 + n)*3 is an expression, not an equation. An expression cannot be solved since there is no equals sign in it.

You cannot write an algebraic expression for that, you need an equation. The equation is n - 6 = 4

3 + 4 = 9 is not an expression, it is an equation (which happens to be false). An equation without a variable is simply a statement which is either true (a tautology) or false. It's main use is probably at the end of a proof where you may show that the left hand side of some equation is numerically the same as the right hand side which proves your proposition. n + 4 = 9 is also not an expression, but an equation. An equation with a variable can divide the domain into distinct partitions such that the equation is true if the value of the variable is within those partitions and not if they are outside. This may enable you to derive further information about he variable(s).

5+6+36-4=43 * * * * * That is an equation, not an expression. An expression might be 5+6+36-4 or 43 but when you put the + sign (or <, > etc) it becomes an equation (or inequality).

3x+4-2y x=5 and y=-3 You substitute these values into the original equation. 15+4+6 = 25

an algebraic expression has no = sign. it could be like x+4, but an equation has to have an = sign. like x+4=5

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