subject: Order Of Operations With Variables [print this page] Introduction to order of operations with variables:
In math, If we have to solve an algebraic expression, we have to follow the order of operations. For getting the perfect answer we have to follow the order of operation. In order of operation we can follow the rule of pemdas, the meaning of pemdas is parentheses, exponents, multiplication, division, addition, subtraction. If we want to solve an expression then we have to solve the expression in the order of pemdas. First we have to simplify the parentheses and exponents and then we have to solve multiplication and division and then at last we have to solve addition and subtraction. Here we are going to learn, how to solve an expression with variables using order of oerations.
Example Problem-1 for Order of Operations with Variables:
( 7x + 4x ) + ( 5x + 8x ) '.' 9x
Solution:
According to Pemdas rule we have to simplify Parentheses and exponents
So we are going to solve the Parentheses in the expression.
(11x) + (13x) '.' 9x
Now we have to solve the multiplication and division in the expression
11x + 117x
Now we have to solve for addition
11x + 117x = 128x
So the answer is 128x
Example Problem -2 for Order of Operations with Variables:
3y '.' ( 5y + 7y ) + 42y '.' (1y + 2y)
Solution:
According to Pemdas rule we have to simplify Parentheses and exponents
So we are going to solve the Parentheses and exponents in the expression.
3y '.' (12y) + 16y '.'(1y)
Now we have to solve the multiplication and division in the expression
