we have the expression
7-3(4-2x)-10x
step 1
Applying PEMDAS
P ----> Parentheses first
E -----> Exponents (Powers and Square Roots, etc.)
MD ----> Multiplication and Division (left-to-right)
AS ----> Addition and Subtraction (left-to-right)
Multiplication and Division (left-to-right)
7-12+6x-10x
Addition and Subtraction (left-to-right)
-5-4x
Verify each person
Jon is wrong , he not follow the orders of operations
Madison is wrong, she make a mistake combined terms because
(4-2x) is not 2x
Selina is wrong, she didn"t use the distributive property correctly because
3(4-2x)=3(4)-3(2x) and not 3(4) -2x
The expression that is equivalent to the original is
-5-4x
and I am sure that this expression is equivalent because i have used the property of PEMDAS