Simplify -(9v-3.6w)+9.1

$- (9 v - 3.6 w) + 9.1$

Apply the distributive property.

$- (9 v) - (- 3.6 w) + 9.1$

Multiply $9$ by $- 1$ .

$- 9 v - (- 3.6 w) + 9.1$

Multiply $- 3.6$ by $- 1$ .

$- 9 v + 3.6 w + 9.1$