643=4 x 160+n in 5 grade math

We need to solve the equation

The first thing we are going to do is perform the multiplication :

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, , in our equation by subtracting 640 from both sides of the equation:

Now, let's check if the solution is a valid solution for our equation; to do it, we are going to replace with in our original equation and check if the resulting equation is true:

Look! our equation is true; we can conclude that is the solution of the equation .

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