King of mathematics, please come in.

There are two. 2a+5= 10，X-2 = 0。

Equation (English: EQUATION) is an equation that represents the equality between two mathematical expressions (such as two numbers, functions, quantities and operations), and there is usually an equal sign "=" between them.

It is neither 7.2x nor 3.5x-x > 0.9 = so it is not an equation.

Hope to adopt

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