Fermi
·
Concept Library
·
Courses
·
Books
·
Problems
·
Simulations
·
Math Wiki
·
High School
Fermi
›
Problems
Mathematics
Mathematics
Problem
Explain why
x
=
−
2
x=-2
x
=
−
2
is not a solution of the equation
3
x
+
5
=
1
3x + 5 = 1
3
x
+
5
=
1
.
Browse the problem library