Question

subtract. (d + 9) - (3d + 4)

Explanation:

Step1: Distribute the negative sign

$(d + 9)- (3d + 4)=d + 9-3d - 4$

Step2: Combine like - terms

$(d-3d)+(9 - 4)=-2d+5$

Answer:

$-2d + 5$