You use substituion to solve a system if equations and, after simplifying, end with a stament that says 7=7. Describe what this statement means about the number of solutions and about the graph of the system.

step-by-step explanation:

b

step-by-step explanation:

a difference is the result of subtraction. while each of these expressions has subtraction in it, a difference will be the result when subtraction is the last operation applied in the order of operations for the expression. this means subtraction must be outside of the parenthesis. only b has this.

answer: 48

just remember to use pemdas:

parentheses

expressions

multiplication

division

addition

subtraction