combine like terms to create an equivalent expression. 3.4 - 2.8d + 2.8d - 1.3

Explanation:

Step1: Identify like - terms

The like - terms are $-2.8d$ and $2.8d$, and the constant terms $3.4$ and $-1.3$.

Step2: Combine $d$ terms

$-2.8d + 2.8d=(-2.8 + 2.8)d=0d = 0$.

Step3: Combine constant terms

$3.4-1.3 = 2.1$.

Step4: Combine results

The combined expression is $0 + 2.1=2.1$.

Answer:

$2.1$