We need to solve the equation \(643=4*160+n\)
The first thing we are going to do is perform the multiplication \(4*160\):
\(643=4*160+n\)
\(643=640+n\)
Remember that the most important thing to solve and equation is isolate (left the variable alone) in one side of the equation. Notice that we can isolate the variable, \(n\), in our equation by subtracting 640 from both sides of the equation:
\(643-640=640-640+n\)
\(3=0+n\)
\(3=n\)
\(n=3\)
Now, let's check if the solution \(n=3\) is a valid solution for our equation; to do it, we are going to replace \(n\) with \(3\) in our original equation and check if the resulting equation is true:
\(643=4*160+n\)
\(643=4*160+3\)
\(643=640+3\)
\(643=643\)
Look! our equation is true; we can conclude that \(n=3\) is the solution of the equation \(643=4*160+n\).
