Question

643=4 x 160+n in 5 grade math

Answer 1

N is 3. so that would.mean that 4×160+3 is 643

Answer 2

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 $643=4*160+n$.