Evaluate 3.4-2.8d+2.8d-1.3

$3.4 - 2.8 d + 2.8 d - 1.3$

Add $- 2.8 d$ and $2.8 d$ .

$3.4 + 0 d - 1.3$

Simplify the expression.

Multiply $0$ by $d$ .

$3.4 + 0 - 1.3$

Add $3.4$ and $0$ .

$3.4 - 1.3$

Subtract $1.3$ from $3.4$ .

$2.1$