Question

write an equation that represents the weights on the hanger.

Explanation:

Step1: Count left side weights

Left side: $a + a + 1 = 2a + 1$

Step2: Count right side weights

Right side: $1+1+1+1+1+1+1+1+1 = 9$

Step3: Set sides equal (balanced hanger)

$2a + 1 = 9$

Answer:

$2a + 1 = 9$