Question

1. $6r - 1 + 6r = 11$

Explanation:

Step1: Combine like terms

$6r + 6r - 1 = 11$
$12r - 1 = 11$

Step2: Isolate variable term

$12r = 11 + 1$
$12r = 12$

Step3: Solve for $r$

$r = \frac{12}{12}$

Answer:

$r = 1$