I've noticed that a lot of students think that when there is just x in an expression with no coefficient, it is automatically equal to 1. Have you noticed or thought this before?

The letter x in math is an unknown number, or variable.

When we have an expression (a group of terms including operations and variables with coefficients, but no equal sign) x can be any number.

When we have an equation (expressions joined by an equal sign), we have to find out which number x is by solving using opposite operations.

Sometimes x = 1, but the chances of x being equal to something else are much greater.

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