Simplify (9c-8d)+(2c-6)+(-d+3)

$(9 c - 8 d) + (2 c - 6) + (- d + 3)$

Remove parentheses.

$9 c - 8 d + 2 c - 6 - d + 3$

Add $9 c$ and $2 c$ .

$11 c - 8 d - 6 - d + 3$

Subtract $d$ from $- 8 d$ .

$11 c - 9 d - 6 + 3$

Add $- 6$ and $3$ .

$11 c - 9 d - 3$