all of the following expressions are equivalent except :
7 - x
x - 7
- x + 7
7 + (- x)
since x has a sign itself, which is not dependent to 7.
All of the following expressions are equivalent except x-7Step-by-step explanation:
Two expressions are said to be equivalent if by some arrangement of terms they are equal to each other.
Now by looking at the four given choices we have:
which is nothing but:
which on opening the parentheses term:
Hence, we get that 1) , 3) and 4) expressions are same i.e. they are equivalent.
whereas the expression which is different is: x-7