Determine the value of rm In the given equation.

1000-n=258 Write the equation

1000-n-1000=258-1000 Subtract 1000 from both sides

-n=-742 Simplify

\(\displaystyle-{1}\frac{n}{{1}}=-\frac{742}{ -{{1}}}\) Divide both sides by -1

n=742 Simplify

Check by substituting the value of n to the original equation.

1000-n=258 Write the equation

1000-742=258 Substitute the value of m

258 =258 This statement is true