use a calculator
Multiply out all the brackets (parentheses) and then combine like terms.
BOMDAS Brackets (parenthesis), Of, Multiplication, Division, Addition, Subtraction
You cannot usually simplify numbers. What you can simplify is numeric or algebraic expressions. You carry out the various operations but use BODMAS (I prefer BIDMAS) to determine the order. First do the Brackets. Next the Index (or power Of) Then, with equal priority, Division and Multiplication And last, again with equal priority, Addition and Subtraction.
4y -5
use a calculator
Multiply out all the brackets (parentheses) and then combine like terms.
BOMDAS Brackets (parenthesis), Of, Multiplication, Division, Addition, Subtraction
In many cases you can simplify an algebraic expression. You don't really "solve" them; an equation can be solved. An equation is a declaration that two expressions are equal, for example, x + 3 = 10.
You cannot usually simplify numbers. What you can simplify is numeric or algebraic expressions. You carry out the various operations but use BODMAS (I prefer BIDMAS) to determine the order. First do the Brackets. Next the Index (or power Of) Then, with equal priority, Division and Multiplication And last, again with equal priority, Addition and Subtraction.
You multiply out brackets, remove common factors from fractions, combine like terms.
4y -5
By long division. Factorisation may work but you cannot depend on that.
They can be used to simplify expressions so that the solutions can be found more easily.
no algebraic expressions do not have equal signs but equations do.
Algebraic expressions are terms that do not include an equality sign
Yes, you can but it depends on the context. You can simplify fractions, or simplify surds, or algebraic expressions and in each case the simplification means different things. So if you want a sensible answer to your question I would suggest that you use a proper question rather than stick a quastion mark at the end of a phrase!