There are a couple types of grouping symbols used in math. These are mainly parentheses and brackets. Both plain and curly brackets are used in some equations.
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an expression
The distributive property is where you will "distribute" a term outside of a set of grouping symbols into all the terms within the set of grouping symbols. For example, to distribute 6(x+3), you would multiply 6 by x and by 3, to get 6x + 18. The distributive property is usually the property used most often to solve for variables in linear equations. For example, in the linear equation, 3(x+2)=4+x, you would have to distribute the 3, since x and 2 are not like terms.
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It's possible to perform other operations first. But if you try it, there's a muchbigger chance that you'll get all tangled up and your result will be wrong.
10-4=6-8=(-2)+2+0