Question

find the length indicated. *hint, writing an equation is helpful. s a t 12 u 19 a =

Explanation:

Step1: Set up equation

From the line - segment, we know that the sum of the lengths of two sub - segments equals the length of the whole segment. So, $a + 12=19$.

Step2: Solve for $a$

Subtract 12 from both sides of the equation: $a=19 - 12$.

Answer:

7