Question

solve for r.
4r + s = 2t - r
r = \frac{2t - \boxed{?}}{\boxed{}}

Explanation:

Step1: Isolate r terms on left

Add $r$ to both sides:
$4r + r + s = 2t$
$5r + s = 2t$

Step2: Move s to right side

Subtract $s$ from both sides:
$5r = 2t - s$

Step3: Solve for r

Divide both sides by 5:
$r = \frac{2t - s}{5}$

Answer:

The missing term in the numerator is $s$, and the denominator is $5$, so $r = \frac{2t - s}{5}$