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What is a Branch of math that uses letters called variables?
Algebra is one.
The branch of math that uses letters called variables in place of numerals?
Algebra
Why are math expressions true?
math expressions are true because its also science
What does left mean in a math problem?
In a math problem, "left" typically refers to the direction on a number line that is less than or before a given point. When solving equations or working with expressions, moving to the left usually involves subtracting or dividing to simplify or isolate variables. The concept of "left" in math is relative and depends on the context of the problem being solved.
How do you do math expressions?
Well in math an expression is a finite combination of symbols that is well-formed according to rules that depend on the context. Symbols can designate numbers (constance), variables, operations, functions, and other mathematical symbols, as well as punctuation, symbols of grouping, and other syntactic symbols. The use of expressions can range from the simple: 3 + 5 it is as easy as 1 2 3 but as you get older your math expressions will get harder.
